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dc32-retro-tech-addon
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reduce main interrupt tick rate

This commit is contained in:
true 2024-08-01 04:45:31 -07:00
parent f4bc0ca1c5
commit 5d1cc3f518
2 changed files with 8 additions and 17 deletions
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10
firmware/retro_tech_fw/user/ch32v00x_it.c
View File

@ -53,26 +53,24 @@ volatile uint32_t uptime;
void SysTick_Handler(void) void SysTick_Handler(void)
{ {
if (++ticnt > 0x7ff) { if (++ticnt > 0x1ff) {
ticnt = 0; ticnt = 0;
uptime++; uptime++;
} }
// send new LEDs (1/128 duty) // send new LEDs (1/128 duty)
if ((ticnt & 0xf) == 3) { if ((ticnt & 0x3) == 0) {
led_send(); led_send();
} }
// process buttons (1/512 duty) // process buttons (1/512 duty)
if ((ticnt & 0x3) == 0) {
btn_poll(); btn_poll();
}
// process ADC (1/256 duty) // process ADC (1/256 duty)
if ((ticnt & 0x07) == 1) { if ((ticnt & 0x1) == 0) {
adc_convert(); adc_convert();
} }
if ((ticnt & 0x07) == 2) { if ((ticnt & 0x1) == 1) {
adc_read(); adc_read();
} }

13
firmware/retro_tech_fw/user/main.c
View File

@ -30,7 +30,7 @@
void systick_init(void) void systick_init(void)
{ {
SysTick->CMP = (SystemCoreClock / 2048) - 1; // we want a 2048Hz interrupt SysTick->CMP = (SystemCoreClock / 512) - 1; // we want a 512Hz interrupt
SysTick->CNT = 0; // clear counter SysTick->CNT = 0; // clear counter
SysTick->CTLR = 0xF; // start counter in /1 mode, enable interrupts, auto-reset counter SysTick->CTLR = 0xF; // start counter in /1 mode, enable interrupts, auto-reset counter
SysTick->SR = 0; // clear count comparison flag SysTick->SR = 0; // clear count comparison flag
@ -82,13 +82,6 @@ void gpio_init()
GPIO_Init(GPIOC, &gpio); GPIO_Init(GPIOC, &gpio);
} }
/*********************************************************************
* @fn main
*
* @brief Main program.
*
* @return none
*/
int main(void) int main(void)
{ {
// configure core // configure core
@ -126,10 +119,10 @@ int main(void)
while(1) { while(1) {
__WFI(); __WFI();
// after sending LEDs, run our program // after sending LEDs, run LED render program
// to update the LED buffer for next time // to update the LED buffer for next time
// we have approx 7ms to render... plenty of time // we have approx 7ms to render... plenty of time
if ((ticnt & 0xf) == 3) { if ((ticnt & 0x3) == 0) {
ui_render(); ui_render();
} }
} }