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Fix PWM sometimes stepping on end of ADC

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This commit is contained in:
Ben V. Brown
2020-12-28 15:59:03 +11:00
parent a2df40417e
commit f20ce0a446
1 changed files with 8 additions and 10 deletions
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18
workspace/TS100/Core/BSP/Miniware/BSP.cpp
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@@ -13,8 +13,8 @@ volatile uint16_t PWMSafetyTimer = 0;
volatile uint8_t pendingPWM = 0; volatile uint8_t pendingPWM = 0;
const uint16_t powerPWM = 255; const uint16_t powerPWM = 255;
static const uint8_t holdoffTicks = 13; // delay of 7 ms static const uint8_t holdoffTicks = 14; // delay of 8 ms
static const uint8_t tempMeasureTicks = 17; static const uint8_t tempMeasureTicks = 25;
uint16_t totalPWM; //htim2.Init.Period, the full PWM cycle uint16_t totalPWM; //htim2.Init.Period, the full PWM cycle
@@ -119,9 +119,9 @@ uint16_t getHandleTemperature() {
int32_t result = getADC(0); int32_t result = getADC(0);
result -= 4965; // remove 0.5V offset result -= 4965; // remove 0.5V offset
// 10mV per C // 10mV per C
// 99.29 counts per Deg C above 0C // 99.29 counts per Deg C above 0C. Tends to read a tad over across all of my sample units
result *= 100; result *= 100;
result /= 993; result /= 994;
return result; return result;
#endif #endif
} }
@@ -201,7 +201,7 @@ void setTipPWM(uint8_t pulse) {
static void switchToFastPWM(void) { static void switchToFastPWM(void) {
fastPWM = true; fastPWM = true;
totalPWM = powerPWM + tempMeasureTicks * 2; totalPWM = powerPWM + tempMeasureTicks * 2 + holdoffTicks;
htim2.Instance->ARR = totalPWM; htim2.Instance->ARR = totalPWM;
// ~3.5 Hz rate // ~3.5 Hz rate
htim2.Instance->CCR1 = powerPWM + holdoffTicks * 2; htim2.Instance->CCR1 = powerPWM + holdoffTicks * 2;
@@ -211,7 +211,7 @@ static void switchToFastPWM(void) {
static void switchToSlowPWM(void) { static void switchToSlowPWM(void) {
fastPWM = false; fastPWM = false;
totalPWM = powerPWM + tempMeasureTicks; totalPWM = powerPWM + tempMeasureTicks + holdoffTicks;
htim2.Instance->ARR = totalPWM; htim2.Instance->ARR = totalPWM;
// ~1.84 Hz rate // ~1.84 Hz rate
htim2.Instance->CCR1 = powerPWM + holdoffTicks; htim2.Instance->CCR1 = powerPWM + holdoffTicks;
@@ -335,12 +335,10 @@ void unstick_I2C() {
} }
uint8_t getButtonA() { uint8_t getButtonA() {
return HAL_GPIO_ReadPin(KEY_A_GPIO_Port, KEY_A_Pin) == GPIO_PIN_RESET ? return HAL_GPIO_ReadPin(KEY_A_GPIO_Port, KEY_A_Pin) == GPIO_PIN_RESET ? 1 : 0;
1 : 0;
} }
uint8_t getButtonB() { uint8_t getButtonB() {
return HAL_GPIO_ReadPin(KEY_B_GPIO_Port, KEY_B_Pin) == GPIO_PIN_RESET ? return HAL_GPIO_ReadPin(KEY_B_GPIO_Port, KEY_B_Pin) == GPIO_PIN_RESET ? 1 : 0;
1 : 0;
} }
void BSPInit(void) { void BSPInit(void) {