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add practice projs

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This commit is contained in:
Ajit Ananthadevan 2025-08-18 19:46:29 +10:00
parent 9a350fc0cc
commit 728c4925ea
13 changed files with 1279 additions and 0 deletions
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33
myapps/practice/02-button-int/src/main.c Normal file
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// TODO fix line 27
// LED: PA8 (active low)
// BUT: PB22 (active low, no pullup)
#include "CH59x_common.h"
__INTERRUPT
__HIGH_CODE
void GPIOB_IRQHandler()
{
if (GPIOB_ReadITFlagBit(GPIO_Pin_8)) {
GPIOA_InverseBits(GPIO_Pin_8);
GPIOB_ClearITFlagBit(GPIO_Pin_8);
}
}
int main()
{
SetSysClock(CLK_SOURCE_PLL_60MHz);
GPIOA_SetBits(GPIO_Pin_8); // LED
GPIOA_ModeCfg(GPIO_Pin_8, GPIO_ModeOut_PP_5mA);
GPIOB_ModeCfg(GPIO_Pin_22, GPIO_ModeIN_PU); // button
GPIOB_ITModeCfg(GPIO_Pin_8, GPIO_ITMode_FallEdge); // PB8 mux'd as PB22 see below
GPIOB_ClearITFlagBit(GPIO_Pin_8);
GPIOPinRemap(ENABLE, RB_PIN_INTX); // <================== workaround, as R16_PB_INT reg is 16b wide
PFIC_EnableIRQ(GPIO_B_IRQn);
while (1);
}

41
myapps/practice/02-button-int/src/main.c.bkp1 Normal file
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// LED: PA8 (active low)
// BUT: PB22 (active low, no pullup)
#include "CH59x_common.h"
#include <stdbool.h>
volatile bool buttonPressed = false;
__INTERRUPT
__HIGH_CODE
void GPIOB_IRQHandler()
{
if (GPIOB_ReadITFlagBit(GPIO_Pin_8)) {
buttonPressed = true;
GPIOB_ClearITFlagBit(GPIO_Pin_8);
}
}
int main()
{
SetSysClock(CLK_SOURCE_PLL_60MHz);
GPIOA_SetBits(GPIO_Pin_8); // LED
GPIOA_ModeCfg(GPIO_Pin_8, GPIO_ModeOut_PP_5mA);
GPIOB_ModeCfg(GPIO_Pin_22, GPIO_ModeIN_PU); // button
GPIOB_ITModeCfg(GPIO_Pin_8, GPIO_ITMode_FallEdge);
GPIOB_ClearITFlagBit(GPIO_Pin_8);
GPIOPinRemap(ENABLE, RB_PIN_INTX); // <==================
PFIC_EnableIRQ(GPIO_B_IRQn);
while (1) {
if (buttonPressed) {
buttonPressed = false;
GPIOA_InverseBits(GPIO_Pin_8);
}
}
}