diff options
Diffstat (limited to 'olsndot/firmware')
| -rw-r--r-- | olsndot/firmware/main.c | 82 |
1 files changed, 42 insertions, 40 deletions
diff --git a/olsndot/firmware/main.c b/olsndot/firmware/main.c index 3966297..4e26200 100644 --- a/olsndot/firmware/main.c +++ b/olsndot/firmware/main.c @@ -10,7 +10,7 @@ int main(void) { RCC->CR |= RCC_CR_HSEON; while (!(RCC->CR&RCC_CR_HSERDY)); - RCC->CFGR &= RCC_CFGR_PLLMUL_Msk & RCC_CFGR_SW_Msk; + RCC->CFGR &= ~RCC_CFGR_PLLMUL_Msk & ~RCC_CFGR_SW_Msk; RCC->CFGR |= (2<<RCC_CFGR_PLLMUL_Pos) | RCC_CFGR_PLLSRC; /* PLL x4 */ RCC->CR |= RCC_CR_PLLON; while (!(RCC->CR&RCC_CR_PLLRDY)); @@ -41,10 +41,12 @@ int main(void) { /* Set shift register IO GPIO output speed */ GPIOA->OSPEEDR |= - (1<<GPIO_OSPEEDR_OSPEEDR5_Pos) /* SCLK */ - | (1<<GPIO_OSPEEDR_OSPEEDR7_Pos) /* MOSI */ - | (1<<GPIO_OSPEEDR_OSPEEDR9_Pos) /* Clear */ - | (1<<GPIO_OSPEEDR_OSPEEDR10_Pos);/* Strobe */ + (3<<GPIO_OSPEEDR_OSPEEDR4_Pos) /* LED1 */ + | (3<<GPIO_OSPEEDR_OSPEEDR5_Pos) /* SCLK */ + | (3<<GPIO_OSPEEDR_OSPEEDR6_Pos) /* LED2 */ + | (3<<GPIO_OSPEEDR_OSPEEDR7_Pos) /* MOSI */ + | (3<<GPIO_OSPEEDR_OSPEEDR9_Pos) /* Clear */ + | (3<<GPIO_OSPEEDR_OSPEEDR10_Pos);/* Strobe */ GPIOA->AFR[0] |= (1<<GPIO_AFRL_AFRL2_Pos) /* USART1_TX */ @@ -60,7 +62,7 @@ int main(void) { /* Configure SPI controller */ /* CPOL=0, CPHA=0, prescaler=8 -> 1MBd */ // SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE | SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (2<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR; - SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE | SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (7<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR; + SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE | SPI_CR1_SSM | SPI_CR1_SSI | SPI_CR1_SPE | (0<<SPI_CR1_BR_Pos) | SPI_CR1_MSTR; SPI1->CR2 = (7<<SPI_CR2_DS_Pos); /* Configure TIM1 for display strobe generation */ /* Configure UART for RS485 comm */ @@ -72,36 +74,27 @@ int main(void) { TIM1->SMCR = 0; TIM1->DIER = 0; - const uint32_t period = 4; TIM1->PSC = 4; // debug /* CH2 - clear/!MR, CH3 - strobe/STCP */ TIM1->CCR2 = 1; - TIM1->CCR3 = period-1; TIM1->RCR = 0; - TIM1->BDTR = TIM_BDTR_MOE | (15<<TIM_BDTR_DTG_Pos); - TIM1->CCMR1 = (7<<TIM_CCMR1_OC2M_Pos); // | TIM_CCMR1_OC2PE; + TIM1->CCMR1 = (6<<TIM_CCMR1_OC2M_Pos); // | TIM_CCMR1_OC2PE; TIM1->CCMR2 = (6<<TIM_CCMR2_OC3M_Pos); // | TIM_CCMR2_OC3PE; TIM1->CCER |= TIM_CCER_CC2E | TIM_CCER_CC2NE | TIM_CCER_CC2P | TIM_CCER_CC3E; // TIM1->CCMR1 = (6<<TIM_CCMR1_OC2M_Pos) | TIM_CCMR1_OC2PE; // TIM1->CCMR2 = (6<<TIM_CCMR2_OC3M_Pos) | TIM_CCMR2_OC3PE; // TIM1->CCER = TIM_CCER_CC2E | TIM_CCER_CC3E; // TIM1->BDTR = TIM_BDTR_MOE; -// TIM1->DIER = TIM_DIER_UIE; + TIM1->DIER = TIM_DIER_UIE; + + NVIC_EnableIRQ(TIM1_BRK_UP_TRG_COM_IRQn); + NVIC_SetPriority(TIM1_BRK_UP_TRG_COM_IRQn, 2); -// NVIC_EnableIRQ(TIM1_CC_IRQn); -// NVIC_SetPriority(TIM1_CC_IRQn, 2); + TIM1->EGR |= TIM_EGR_UG; for (;;) { GPIOA->ODR ^= GPIO_ODR_6; - TIM1->CNT = period-1; - TIM1->ARR = period; - TIM1->EGR |= TIM_EGR_UG; - TIM1->ARR = 2; - TIM1->CR1 |= TIM_CR1_CEN; - GPIOA->BSRR = GPIO_BSRR_BR_6 | GPIO_BSRR_BR_4; LL_mDelay(1); - SPI1->DR = 0x88<<8; - while (SPI1->SR & SPI_SR_BSY); } } @@ -110,29 +103,38 @@ uint8_t brightness_by_bit[NBITS] = { 0x11, 0x22, 0x44, 0x88 }; -void TIM1_CC_IRQHandler(void) { - static uint32_t bitpos = 0; - bitpos = (bitpos+1)&(NBITS-1); +/* + * 1.00us + * 1.64us + * 2.84us + * 5.36us + * 10.4us + * 20.4us + * 40.4us + * 80.8us + */ +void TIM1_BRK_UP_TRG_COM_IRQHandler(void) { + static uint32_t idx = 0; + idx = (idx+1)&7; - GPIOA->ODR ^= GPIO_ODR_6 | GPIO_ODR_4; + GPIOA->ODR ^= GPIO_ODR_4; + TIM1->CCMR1 = (4<<TIM_CCMR1_OC2M_Pos); // | TIM_CCMR1_OC2PE; -// SPI1->DR = ((uint32_t)brightness_by_bit[bitpos])<<8; - SPI1->DR = (bitpos<<8) | (bitpos<<10) | (bitpos<<12) | (bitpos<<14); + SPI1->DR = 0x88<<8; while (SPI1->SR & SPI_SR_BSY); - const uint32_t cycles_strobe = 2; - const uint32_t cycles_clear = 2; - const uint32_t base_val = 16; - uint32_t period = base_val<<bitpos; - -// TIM1->ARR = period; -// TIM1->ARR = 1024; -// TIM1->CCR3 = cycles_strobe; /* strobe */ -// TIM1->CCR2 = period-cycles_clear; /* clear */ -// TIM1->EGR |= TIM_EGR_UG; -// TIM1->ARR = cycles_strobe+1; -// LL_mDelay(1); -// TIM1->CR1 |= TIM_CR1_CEN; + const uint32_t period_base = 4; /* 1us */ + const uint32_t period = period_base<<idx; +// TIM1->BDTR = TIM_BDTR_MOE | (16<<TIM_BDTR_DTG_Pos); + TIM1->BDTR = TIM_BDTR_MOE | (0<<TIM_BDTR_DTG_Pos); + TIM1->CCR3 = period-1; + TIM1->CNT = period-1; + TIM1->ARR = period; + TIM1->CCMR1 = (6<<TIM_CCMR1_OC2M_Pos); // | TIM_CCMR1_OC2PE; + TIM1->EGR |= TIM_EGR_UG; + TIM1->ARR = 2; + TIM1->CR1 |= TIM_CR1_CEN; + TIM1->SR &= ~TIM_SR_UIF_Msk; } void NMI_Handler(void) { |