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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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12
firmware/retro_tech_fw/user/ch32v00x_it.c
View File

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

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

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