working version
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5eca151828
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2a89d39f19
289
main.c
289
main.c
@ -78,140 +78,49 @@ static int uart_putchar(char c, FILE *stream)
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static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, _FDEV_SETUP_WRITE);
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static uint8_t i2c_cmd;
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static uint8_t i2c_dev;
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static uint16_t i2c_address;
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static uint8_t i2c_buf[64];
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static volatile uint8_t i2c_complete;
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void i2c_transfer(uint8_t cmd)
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static uint8_t i2c_master_tx(uint8_t val)
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{
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i2c_complete = 0;
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i2c_cmd = cmd;
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TWCR |= (1<<TWINT) | (1<<TWSTA);
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PORTB |= LED_RT;
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while (i2c_complete != 1) {
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if (i2c_complete == 2) {
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_delay_ms(5);
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TWCR |= (1<<TWINT) | (1<<TWSTA);
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}
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}
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PORTB &= ~LED_RT;
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}
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ISR(TWI_vect)
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{
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static uint8_t bcnt;
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TWDR = val;
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TWCR = (1<<TWINT) | (1<<TWEN);
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loop_until_bit_is_set(TWCR, TWINT);
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uint8_t status = TWSR & 0xF8;
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// printf("status: 0x%02x 0x%02x 0x%02x\n", i2c_cmd, status, bcnt);
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return status;
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}
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switch (status) {
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/* START transmitted -> send SLA+W */
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case 0x08:
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bcnt = 0;
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TWDR = (i2c_dev << 1);
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TWCR &= ~(1<<TWSTA);
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TWCR |= (1<<TWINT);
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static uint8_t i2c_master_rx(uint8_t *val, uint8_t ack)
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{
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if (ack)
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TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
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else
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TWCR = (1<<TWINT) | (1<<TWEN);
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loop_until_bit_is_set(TWCR, TWINT);
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*val = TWDR;
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uint8_t status = TWSR & 0xF8;
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return status;
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}
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static void i2c_stop(void)
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{
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PORTB &= ~LED_RT;
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TWCR = (1<<TWINT) | (1<<TWSTO) | (1<<TWEN);
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}
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static void i2c_start_address(uint8_t addr)
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{
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while (1) {
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PORTB |= LED_RT;
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TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
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loop_until_bit_is_set(TWCR, TWINT);
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uint8_t status = i2c_master_tx(addr);
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if (status == 0x18 || status == 0x40)
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break;
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/* repeated START transmitted -> send SLA+R */
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case 0x10:
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bcnt = 0;
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TWDR = (i2c_dev << 1) | 0x01;
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TWCR &= ~(1<<TWSTA);
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TWCR |= (1<<TWINT);
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break;
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/* SLA+W transmitted, ACK received -> send command */
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case 0x18:
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bcnt++;
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TWDR = i2c_cmd;
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TWCR |= (1<<TWINT);
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break;
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/* data transmitted, ACK received -> ? */
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case 0x28:
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switch (i2c_cmd) {
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case CMD_GET_INFO:
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case CMD_GET_SIGNATURE:
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case CMD_READ_FLASH:
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case CMD_READ_EEPROM:
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TWCR |= (1<<TWINT) | (1<<TWSTA);
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break;
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case CMD_WRITE_FLASH:
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case CMD_WRITE_EEPROM:
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if (bcnt == 1) {
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TWDR = (i2c_address >> 8);
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} else if (bcnt == 2) {
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TWDR = (i2c_address & 0xFF);
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} else if (bcnt == 3) {
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TWDR = (WRITE_COOKIE >> 8);
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} else if (bcnt == 4) {
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TWDR = (WRITE_COOKIE & 0xFF);
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} else if (bcnt >= 5 && bcnt < (64 +5)) {
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TWDR = i2c_buf[bcnt -5];
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} else {
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i2c_complete = 1;
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TWCR |= (1<<TWSTO);
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}
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TWCR |= (1<<TWINT);
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break;
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default:
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case CMD_BOOT_APPLICATION:
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case CMD_BOOT_LOADER:
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i2c_complete = 1;
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TWCR |= (1<<TWINT) | (1<<TWSTO);
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break;
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}
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bcnt++;
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break;
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/* SLA+R transmitted, ACK received -> send ACK (send more data) */
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case 0x40:
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TWCR |= (1<<TWINT) | (1<<TWEA);
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break;
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/* data received, ACK sent */
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case 0x50:
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i2c_buf[bcnt++] = TWDR;
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if ((i2c_cmd == CMD_GET_INFO && bcnt < 16) ||
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(i2c_cmd == CMD_GET_SIGNATURE && bcnt < 4) ||
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((i2c_cmd == CMD_READ_FLASH || i2c_cmd == CMD_READ_EEPROM) && bcnt < 64)) {
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TWCR |= (1<<TWEA);
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} else {
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TWCR &= ~(1<<TWEA);
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}
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TWCR |= (1<<TWINT);
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break;
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/* data received, NACK sent */
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case 0x58:
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i2c_buf[bcnt++] = TWDR;
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i2c_complete = 1;
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TWCR |= (1<<TWINT) | (1<<TWSTO);
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break;
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/* SLA+W transmitted, NACK received */
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case 0x20:
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/* data transmitted, NACK received */
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case 0x30:
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/* arbitation lost during SLA+W, SLA+R or data */
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case 0x38:
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/* SLA+R transmitted, NACK received */
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default:
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i2c_complete = 2;
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TWCR |= (1<<TWINT) | (1<<TWSTO);
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break;
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i2c_stop();
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_delay_ms(1);
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}
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}
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@ -331,8 +240,15 @@ static uint16_t readEEpromPage(uint16_t address, uint16_t size)
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void cmd_loop(void)
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{
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uint8_t dev = 0;
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uint8_t i2c_dev = (0x21 << 1);
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i2c_dev = 0x21;
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sendchar('F');
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sendchar('C');
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sendchar('_');
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sendchar('B');
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sendchar('O');
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sendchar('O');
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sendchar('T');
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while (1) {
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uint8_t val = recvchar();
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@ -366,22 +282,24 @@ void cmd_loop(void)
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*tmp++ = (cnt < size) ? recvchar() : 0xFF;
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if (dev == DEVCODE_M8) {
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if (val == 'F') {
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i2c_start_address(i2c_dev);
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if (val == 'F')
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i2c_master_tx(CMD_WRITE_FLASH);
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else
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i2c_master_tx(CMD_WRITE_EEPROM);
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i2c_master_tx(address >> 8);
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i2c_master_tx(address & 0xFF);
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address += sizeof(page_buf);
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i2c_master_tx(WRITE_COOKIE >> 8);
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i2c_master_tx(WRITE_COOKIE & 0xFF);
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tmp = page_buf;
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while (size) {
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i2c_address = address;
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for (cnt = 0; cnt < sizeof(i2c_buf); cnt++)
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i2c_buf[cnt] = *tmp++;
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for (cnt = 0; cnt < sizeof(page_buf); cnt++)
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i2c_master_tx(*tmp++);
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i2c_transfer(CMD_WRITE_FLASH);
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address += sizeof(i2c_buf);
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size -= sizeof(i2c_buf);
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}
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} else if (val == 'E') {
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}
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i2c_stop();
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} else if (dev == DEVCODE_M644) {
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if (val == 'F') {
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@ -399,21 +317,23 @@ void cmd_loop(void)
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val = recvchar();
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if (dev == DEVCODE_M8) {
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if (val == 'F') {
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while (size > 0) {
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uint8_t i = 0;
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i2c_address = address;
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i2c_transfer(CMD_READ_FLASH);
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i2c_start_address(i2c_dev);
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if (val == 'F')
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i2c_master_tx(CMD_READ_FLASH);
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else
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i2c_master_tx(CMD_READ_EEPROM);
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address += sizeof(i2c_buf);
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while (size-- && i < sizeof(i2c_buf))
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sendchar(i2c_buf[i++]);
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i2c_master_tx(address >> 8);
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i2c_master_tx(address & 0xFF);
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i2c_start_address(i2c_dev | 0x01);
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while (size--) {
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i2c_master_rx(&val, size > 0);
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sendchar(val);
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address++;
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}
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} else if (val == 'E') {
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sendchar(0xff);
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}
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i2c_stop();
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} else if (dev == DEVCODE_M644) {
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if (val == 'F') {
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@ -437,14 +357,27 @@ void cmd_loop(void)
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// Enter programming mode
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} else if (val == 'P') {
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/* boot loader */
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i2c_transfer(CMD_BOOT_LOADER);
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i2c_start_address(i2c_dev);
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i2c_master_tx(CMD_BOOT_LOADER);
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i2c_stop();
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_delay_ms(10);
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i2c_start_address(i2c_dev);
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i2c_master_tx(CMD_GET_SIGNATURE);
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i2c_start_address(i2c_dev | 0x01);
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i2c_master_rx(&val, 1);
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i2c_master_rx(&val, 1);
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i2c_master_rx(&val, 0);
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i2c_stop();
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sendchar('\r');
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// Leave programming mode
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} else if (val == 'L') {
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/* boot application */
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i2c_transfer(CMD_BOOT_APPLICATION);
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i2c_start_address(i2c_dev);
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i2c_master_tx(CMD_BOOT_APPLICATION);
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i2c_stop();
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sendchar('\r');
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// return programmer type
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@ -478,7 +411,7 @@ void cmd_loop(void)
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sendchar('T');
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// Return Software Version
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} else if (val == 'V') {
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} else if (val == 'V' || val == 'v') {
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sendchar('0');
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sendchar('8');
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@ -502,9 +435,23 @@ void cmd_loop(void)
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// set i2c target
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} else if (val >= '1' && val <= '4') {
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i2c_dev = val - '1' + 0x21;
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i2c_dev = (val - '1' + 0x21) << 1;
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sendchar(val);
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// test props
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} else if (val == 'l') {
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i2c_start_address(i2c_dev);
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i2c_master_tx(CMD_SET_PWM);
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i2c_master_tx(0x00);
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i2c_stop();
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// test props
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} else if (val == 'k') {
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i2c_start_address(i2c_dev);
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i2c_master_tx(CMD_SET_PWM);
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i2c_master_tx(0x0f);
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i2c_stop();
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/* ESC */
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} else if (val != 0x1b) {
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sendchar('?');
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@ -541,38 +488,22 @@ int main(void)
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/* enable TWI interface */
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TWBR = ((F_CPU/TWI_CLK)-16)/2;
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TWCR = (1<<TWSTO) | (1<<TWEN) | (1<<TWIE);
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TWCR = (1<<TWSTO) | (1<<TWEN);
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sei();
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while (boot_timeout > 0) {
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if (UCSR0A & (1<<RXC0))
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if (recvchar() == 'S')
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cmd_loop();
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}
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cli();
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/* disable TWI */
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TWCR = 0x00;
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/* disable Timer0 */
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TIMSK0 = 0x00;
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TCCR0B = 0x00;
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/* disable USART */
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UCSR0C = 0x00;
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UCSR0B = 0x00;
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/* move interrupt-vectors to applicaion */
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MCUCR = (1<<IVCE);
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MCUCR = (0<<IVSEL);
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PORTB = 0x00;
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uint8_t i;
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for (i = 0; i < 10; i++)
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_delay_ms(10);
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jump_to_app();
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return 0;
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