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THERE IS NO GOD

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XANTRONIX Development 2016-05-29 01:12:51 -05:00
parent 550623ee5d
commit 3223228e0b
1 changed files with 19 additions and 14 deletions
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23
avr/main.c
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@ -20,7 +20,8 @@ static const uint16_t timer_counter_intervals[4] = {
static volatile tabby_avr_buffer buffer = {
.len = 0,
.cur = 0
.cur = 0,
.read = 0
};
static tabby_clock_source source = TABBY_CLOCK_SOURCE_INTERNAL;
@ -74,6 +75,8 @@ ISR(SPI_STC_vect) {
if (buffer.cur < buffer.len) {
SPDR = buffer.data[buffer.cur++];
} else {
SPDR = 0xff;
buffer.len = 0;
buffer.cur = 0;
buffer.read = 0;
@ -84,17 +87,17 @@ static void setup_clock_internal(tabby_clock_speed speed) {
/*
* Configure MISO as output
*/
DDRB |= (1 << DDB3);
DDRB |= (1 << DDB4);
/*
* Configure MOSI as input
*/
DDRB &= ~(1 << DDB2);
DDRB &= ~(1 << DDB3);
/*
* Configure SCK pin as output
*/
DDRB |= (1 << DDB1);
DDRB |= (1 << DDB5);
/*
* Enable timer interrupt vector
@ -128,12 +131,12 @@ static void setup_clock_external() {
/*
* Configure MISO as output
*/
DDRB |= (1 << DDB3);
DDRB |= (1 << DDB4);
/*
* Configure MOSI as input
* Configure SS as input
*/
DDRB &= ~(1 << DDB3);
DDRB &= ~(1 << DDB2);
/*
* Set SPI slave mode, and shift in/out most significant bit first
@ -152,6 +155,7 @@ static void setup_clock_external() {
buffer.len = 0;
buffer.cur = 0;
buffer.read = 0;
}
/*static void snooze() {
@ -210,7 +214,7 @@ int main() {
break;
}
case TABBY_COMMAND_CLOCK_SOURCE:
case TABBY_COMMAND_CLOCK_SOURCE: {
switch (c) {
case TABBY_CLOCK_SOURCE_INTERNAL: {
source = c;
@ -232,6 +236,7 @@ int main() {
goto reset;
}
}
}
case TABBY_COMMAND_CLOCK_SPEED: {
switch (c) {
@ -254,7 +259,7 @@ int main() {
}
default: {
break;
goto reset;
}
}