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@ -38,15 +38,15 @@ |
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*/ |
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#if defined (__AVR_ATmega8__) |
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#define VERSION_STRING "TWIBOOT m8v2.0" |
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#define VERSION_STRING "TWIBOOT m8v2.1" |
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#define SIGNATURE_BYTES 0x1E, 0x93, 0x07 |
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#elif defined (__AVR_ATmega88__) |
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#define VERSION_STRING "TWIBOOT m88v2.0" |
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#define VERSION_STRING "TWIBOOT m88v2.1" |
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#define SIGNATURE_BYTES 0x1E, 0x93, 0x0A |
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#elif defined (__AVR_ATmega168__) |
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#define VERSION_STRING "TWIBOOT m168v2.0" |
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#define VERSION_STRING "TWIBOOT m168v2.1" |
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#define SIGNATURE_BYTES 0x1E, 0x94, 0x06 |
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#else |
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@ -61,10 +61,15 @@ |
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/* 40 * 25ms */ |
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#define TIMEOUT 40 |
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#define LED_RT (1<<PORTB4) |
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#define LED_GN (1<<PORTB5) |
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#define LED_INIT() DDRB = ((1<<PORTB4) | (1<<PORTB5)) |
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#define LED_RT_ON() PORTB |= (1<<PORTB4) |
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#define LED_RT_OFF() PORTB &= ~(1<<PORTB4) |
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#define LED_GN_ON() PORTB |= (1<<PORTB5) |
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#define LED_GN_OFF() PORTB &= ~(1<<PORTB5) |
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#define LED_GN_TOGGLE() PORTB ^= (1<<PORTB5) |
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#define LED_OFF() PORTB = 0x00 |
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#define TWI_ADDRESS 0x21 |
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#define TWI_ADDRESS 0x29 |
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/* SLA+R */ |
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#define CMD_WAIT 0x00 |
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@ -214,7 +219,7 @@ ISR(TWI_vect) |
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/* SLA+W received, ACK returned -> receive data and ACK */ |
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case 0x60: |
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bcnt = 0; |
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PORTB |= LED_RT; |
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LED_RT_ON(); |
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TWCR |= (1<<TWINT) | (1<<TWEA); |
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break; |
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@ -314,7 +319,7 @@ ISR(TWI_vect) |
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/* SLA+R received, ACK returned -> send data */ |
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case 0xA8: |
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bcnt = 0; |
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PORTB |= LED_RT; |
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LED_RT_ON(); |
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/* prev. SLA+R, data sent, ACK returned -> send data */ |
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case 0xB8: |
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@ -350,7 +355,7 @@ ISR(TWI_vect) |
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case 0xA0: |
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/* data sent, NACK returned */ |
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case 0xC0: |
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PORTB &= ~LED_RT; |
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LED_RT_OFF(); |
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TWCR |= (1<<TWINT) | (1<<TWEA); |
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break; |
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@ -367,7 +372,7 @@ ISR(TIMER0_OVF_vect) |
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TCNT0 = TIMER_RELOAD; |
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/* blink LED while running */ |
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PORTB ^= LED_GN; |
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LED_GN_TOGGLE(); |
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/* count down for app-boot */ |
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if (boot_timeout > 1) |
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@ -398,8 +403,8 @@ void disable_wdt_timer(void) |
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int main(void) __attribute__ ((noreturn)); |
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int main(void) |
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{ |
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DDRB = LED_GN | LED_RT; |
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PORTB = LED_GN; |
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LED_INIT(); |
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LED_GN_ON(); |
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/* move interrupt-vectors to bootloader */ |
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/* timer0: running with F_CPU/1024, OVF interrupt */ |
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@ -444,7 +449,7 @@ int main(void) |
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MCUCR = (0<<IVSEL); |
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#endif |
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PORTB = 0x00; |
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LED_OFF(); |
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uint16_t wait = 0x0000; |
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do { |
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