new i2c protocol
This commit is contained in:
parent
cb19bb91ec
commit
5fa8d27b5c
171
i2c-slave.c
171
i2c-slave.c
@ -27,13 +27,39 @@
|
||||
extern struct blmc_ blmc;
|
||||
extern struct ee_param params;
|
||||
|
||||
/* SLA+R */
|
||||
#define CMD_WAIT 0x00
|
||||
#define CMD_GET_INFO 0x10
|
||||
#define CMD_SET_PWM 0x21
|
||||
#define CMD_GET_STATUS 0x22
|
||||
#define CMD_SET_PARAM 0x23
|
||||
#define CMD_GET_PARAM 0x24
|
||||
#define CMD_BOOT_LOADER 0x2F
|
||||
#define CMD_READ_VERSION 0x01
|
||||
#define CMD_READ_MEMORY 0x02
|
||||
/* internal mappings */
|
||||
#define CMD_READ_CHIPINFO (0x10 | CMD_READ_MEMORY)
|
||||
#define CMD_READ_FLASH (0x20 | CMD_READ_MEMORY)
|
||||
#define CMD_READ_EEPROM (0x30 | CMD_READ_MEMORY)
|
||||
#define CMD_READ_PARAMETERS (0x40 | CMD_READ_MEMORY) /* only in APP */
|
||||
|
||||
/* SLA+W */
|
||||
#define CMD_SWITCH_APPLICATION CMD_READ_VERSION
|
||||
#define CMD_WRITE_MEMORY CMD_READ_MEMORY
|
||||
/* internal mappings */
|
||||
#define CMD_BOOT_BOOTLOADER (0x10 | CMD_SWITCH_APPLICATION) /* only in APP */
|
||||
#define CMD_BOOT_APPLICATION (0x20 | CMD_SWITCH_APPLICATION)
|
||||
#define CMD_WRITE_CHIPINFO (0x10 | CMD_WRITE_MEMORY) /* invalid */
|
||||
#define CMD_WRITE_FLASH (0x20 | CMD_WRITE_MEMORY)
|
||||
#define CMD_WRITE_EEPROM (0x30 | CMD_WRITE_MEMORY)
|
||||
#define CMD_WRITE_PARAMETERS (0x40 | CMD_WRITE_MEMORY) /* only in APP */
|
||||
|
||||
/* CMD_SWITCH_APPLICATION parameter */
|
||||
#define BOOTTYPE_BOOTLOADER 0x00 /* only in APP */
|
||||
#define BOOTTYPE_APPLICATION 0x80
|
||||
|
||||
/* CMD_{READ|WRITE}_* parameter */
|
||||
#define MEMTYPE_CHIPINFO 0x00
|
||||
#define MEMTYPE_FLASH 0x01
|
||||
#define MEMTYPE_EEPROM 0x02
|
||||
#define MEMTYPE_PARAMETERS 0x03 /* only in APP */
|
||||
|
||||
|
||||
|
||||
|
||||
const static uint8_t info[16] = "blmc m8-v1.2 ";
|
||||
|
||||
@ -41,6 +67,8 @@ ISR(TWI_vect)
|
||||
{
|
||||
static uint8_t cmd;
|
||||
static uint8_t bcnt;
|
||||
uint8_t data;
|
||||
uint8_t ack = (1<<TWEA);
|
||||
|
||||
switch (TWSR & 0xF8) {
|
||||
/* SLA + W received, ACK returned -> receive Data and ACK */
|
||||
@ -51,43 +79,78 @@ ISR(TWI_vect)
|
||||
|
||||
/* prev. SLA + W, data received, ACK returned -> receive Data and ACK */
|
||||
case 0x80:
|
||||
if (bcnt == 0) {
|
||||
cmd = TWDR;
|
||||
switch (cmd) {
|
||||
case CMD_BOOT_LOADER:
|
||||
wdt_enable(WDTO_15MS);
|
||||
|
||||
case CMD_GET_INFO:
|
||||
case CMD_SET_PWM:
|
||||
case CMD_GET_STATUS:
|
||||
case CMD_SET_PARAM:
|
||||
case CMD_GET_PARAM:
|
||||
data = TWDR;
|
||||
switch (bcnt) {
|
||||
case 0:
|
||||
switch (data) {
|
||||
case CMD_SWITCH_APPLICATION:
|
||||
case CMD_WRITE_MEMORY:
|
||||
cmd = data;
|
||||
bcnt++;
|
||||
break;
|
||||
|
||||
default:
|
||||
blmc.flags |= FLAG_I2C_ACTIVE;
|
||||
setpwm(data);
|
||||
cmd = CMD_WAIT;
|
||||
bcnt = 0;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
} else if (cmd == CMD_SET_PWM) {
|
||||
blmc.flags |= FLAG_I2C_ACTIVE;
|
||||
setpwm(TWDR);
|
||||
bcnt = 0;
|
||||
|
||||
} else if (cmd == CMD_SET_PARAM) {
|
||||
((uint8_t *)¶ms)[bcnt++ -1] = TWDR;
|
||||
if (bcnt > sizeof(params)) {
|
||||
write_parameters();
|
||||
bcnt = 0;
|
||||
}
|
||||
case 1:
|
||||
switch (cmd) {
|
||||
case CMD_SWITCH_APPLICATION:
|
||||
if (data == BOOTTYPE_BOOTLOADER) {
|
||||
wdt_enable(WDTO_15MS);
|
||||
|
||||
} else {
|
||||
bcnt = 0;
|
||||
ack = (0<<TWEA);
|
||||
}
|
||||
break;
|
||||
|
||||
case CMD_WRITE_MEMORY:
|
||||
bcnt++;
|
||||
if (data == MEMTYPE_PARAMETERS) {
|
||||
cmd = CMD_WRITE_PARAMETERS;
|
||||
|
||||
} else {
|
||||
ack = (0<<TWEA);
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
ack = (0<<TWEA);
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case 2: /* ignore address bytes */
|
||||
case 3:
|
||||
bcnt++;
|
||||
break;
|
||||
|
||||
default:
|
||||
switch (cmd) {
|
||||
case CMD_WRITE_PARAMETERS:
|
||||
((uint8_t *)¶ms)[bcnt++ -4] = data;
|
||||
if (bcnt == sizeof(params)) {
|
||||
write_parameters();
|
||||
ack = (0<<TWEA);
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
ack = (0<<TWEA);
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
TWCR |= (1<<TWINT) | (1<<TWEA);
|
||||
if (ack == 0x00)
|
||||
bcnt = 0;
|
||||
|
||||
TWCR |= (1<<TWINT) | ack;
|
||||
break;
|
||||
|
||||
/* SLA+R received, ACK returned -> send data */
|
||||
@ -96,55 +159,27 @@ ISR(TWI_vect)
|
||||
/* prev. SLA+R, data sent, ACK returned -> send data */
|
||||
case 0xB8:
|
||||
switch (cmd) {
|
||||
case CMD_GET_INFO:
|
||||
TWDR = info[bcnt++];
|
||||
case CMD_WAIT:
|
||||
data = 0x00; /* TODO: transmit Current and MaxPWM */
|
||||
break;
|
||||
|
||||
case CMD_READ_VERSION:
|
||||
data = info[bcnt++];
|
||||
bcnt %= sizeof(info);
|
||||
break;
|
||||
|
||||
case CMD_GET_STATUS:
|
||||
switch (bcnt++) {
|
||||
case 0: TWDR = blmc.pwm - blmc.pwm_limit;
|
||||
break;
|
||||
|
||||
case 1: TWDR = blmc.pwm;
|
||||
break;
|
||||
|
||||
case 2: TWDR = (blmc.rpm & 0xFF);
|
||||
break;
|
||||
|
||||
case 3: TWDR = (blmc.rpm >> 8);
|
||||
break;
|
||||
|
||||
case 4: TWDR = (blmc.current & 0xFF);
|
||||
break;
|
||||
|
||||
case 5: TWDR = (blmc.current >> 8);
|
||||
break;
|
||||
|
||||
case 6: TWDR = (blmc.voltage & 0xFF);
|
||||
break;
|
||||
|
||||
case 7: TWDR = (blmc.voltage >> 8);
|
||||
bcnt = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
bcnt = 0;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case CMD_GET_PARAM:
|
||||
TWDR = ((uint8_t *)¶ms)[bcnt++];
|
||||
case CMD_READ_PARAMETERS:
|
||||
data = ((uint8_t *)¶ms)[bcnt++];
|
||||
if (bcnt > sizeof(params))
|
||||
bcnt = 0;
|
||||
break;
|
||||
|
||||
default:
|
||||
TWDR = 0xFF;
|
||||
data = 0xFF;
|
||||
break;
|
||||
}
|
||||
|
||||
TWDR = data;
|
||||
TWCR |= (1<<TWINT) | (1<<TWEA);
|
||||
break;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user