having problems with dma m2m mode

2 files changed, 19 insertions, 9 deletions

diff --git a/controller/fw/src/adc.c b/controller/fw/src/adc.c
index 4801525..fba2420 100644
--- a/controller/fw/src/adc.c
+++ b/controller/fw/src/adc.c
@@ -37,29 +37,30 @@ void adc_init() {
     while (adc_stream->CR & DMA_SxCR_EN)
         ; /* wait for stream to become available */
     adc_stream->NDTR = FMEAS_FFT_LEN/2; 
-    adc_stream->PAR = ADC1->DR;
+    adc_stream->PAR = &(ADC1->DR);
     adc_stream->M0AR = (uint32_t) (adc_fft_buf[0] + FMEAS_FFT_LEN/2);
     adc_stream->M1AR = (uint32_t) (adc_fft_buf[1] + FMEAS_FFT_LEN/2);
     adc_stream->CR = (dma_adc_channel<<DMA_SxCR_CHSEL_Pos) | DMA_SxCR_DBM | (1<<DMA_SxCR_MSIZE_Pos)
-        | (1<<DMA_SxCR_PSIZE_Pos) | DMA_SxCR_MINC | DMA_SxCR_CIRC | DMA_SxCR_PFCTRL
-        | DMA_SxCR_TCIE | DMA_SxCR_TEIE | DMA_SxCR_DMEIE | DMA_SxCR_EN;
+        | (1<<DMA_SxCR_PSIZE_Pos) | DMA_SxCR_MINC | (2<<DMA_SxCR_PL_Pos)
+        | DMA_SxCR_TCIE | DMA_SxCR_TEIE | DMA_SxCR_DMEIE;
     adc_stream->CR |= DMA_SxCR_EN;
 
     NVIC_EnableIRQ(DMA2_Stream0_IRQn);
     NVIC_SetPriority(DMA2_Stream0_IRQn, 128);
 
     ADC1->CR1 = (0<<ADC_CR1_RES_Pos) | (0<<ADC_CR1_DISCNUM_Pos) | ADC_CR1_DISCEN | (0<<ADC_CR1_AWDCH_Pos);
-    ADC1->CR2 = ADC_CR2_EXTEN | (0<<ADC_CR2_EXTSEL_Pos) | ADC_CR2_DMA | ADC_CR2_ADON | ADC_CR2_DDS;
+    ADC1->CR2 = (1<<ADC_CR2_EXTEN_Pos) | (0<<ADC_CR2_EXTSEL_Pos) | ADC_CR2_DMA | ADC_CR2_ADON | ADC_CR2_DDS;
     ADC1->SQR3 = (adc_channel<<ADC_SQR3_SQ3_Pos);
     ADC1->SQR1 = (0<<ADC_SQR1_L_Pos);
 
     TIM1->CR2 = (2<<TIM_CR2_MMS_Pos); /* Enable update event on TRGO to provide a 1ms reference to rest of system */
-    TIM1->CR1 = TIM_CR1_CEN;
     TIM1->CCMR1 = (6<<TIM_CCMR1_OC1M_Pos) | (0<<TIM_CCMR1_CC1S_Pos);
     TIM1->CCER = TIM_CCER_CC1E;
     TIM1->PSC = 84-1; /* 1us ticks @ f_APB2=84MHz */
     TIM1->ARR = 1000-1; /* 1ms period */
-    TIM1->CCR1 = 1;
+    TIM1->CCR1 = 500-1;
+    TIM1->BDTR = TIM_BDTR_MOE;
+    TIM1->CR1 = TIM_CR1_CEN;
     TIM1->EGR = TIM_EGR_UG;
 }
 
@@ -75,14 +76,16 @@ void DMA2_Stream0_IRQHandler(void) {
         if (mem_stream->CR & DMA_SxCR_EN)
             panic(); /* We should be long done by now. */
 
+        adc_dma->LIFCR = 0x3d<<DMA_LISR_FEIF1_Pos;
         mem_stream->NDTR = FMEAS_FFT_LEN/2; 
         int ct = !!(adc_stream->CR & DMA_SxCR_CT);
         /* back half of old buffer (that was just written) */
-        mem_stream->PAR = (uint32_t)(adc_fft_buf[!ct]);
+        mem_stream->PAR = (uint32_t)(adc_fft_buf[!ct] + FMEAS_FFT_LEN/2);
         /* front half of current buffer (whose back half is being written now) */
         mem_stream->M0AR = (uint32_t) (adc_fft_buf[ct] + 0);
+
         mem_stream->CR = (1<<DMA_SxCR_MSIZE_Pos) | (1<<DMA_SxCR_PSIZE_Pos) | DMA_SxCR_MINC | DMA_SxCR_PINC 
-            | DMA_SxCR_TCIE | DMA_SxCR_TEIE | DMA_SxCR_DMEIE;
+            | (0<<DMA_SxCR_PL_Pos) | (2<<DMA_SxCR_DIR_Pos);
         mem_stream->CR |= DMA_SxCR_EN;
 
         /* Kickoff FFT */
diff --git a/controller/fw/src/main.c b/controller/fw/src/main.c
index 58977f7..4f2d67b 100644
--- a/controller/fw/src/main.c
+++ b/controller/fw/src/main.c
@@ -96,6 +96,8 @@ static void spi_flash_if_set_cs(bool val) {
 
 static void spi_flash_setup(void)
 {
+    RCC->AHB1ENR |= RCC_AHB1ENR_GPIOBEN;
+
     GPIOB->MODER &= ~GPIO_MODER_MODER3_Msk & ~GPIO_MODER_MODER4_Msk & ~GPIO_MODER_MODER5_Msk & ~GPIO_MODER_MODER0_Msk;
     GPIOB->MODER |= (2<<GPIO_MODER_MODER3_Pos) /* SCK */
         | (2<<GPIO_MODER_MODER4_Pos) /* MISO */
@@ -114,7 +116,7 @@ static void spi_flash_setup(void)
 
     RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
     RCC->APB2RSTR |= RCC_APB2RSTR_SPI1RST;
-    RCC->APB2RSTR &= RCC_APB2RSTR_SPI1RST;
+    RCC->APB2RSTR &= ~RCC_APB2RSTR_SPI1RST;
 
     spif_init(&spif, 256, SPI1, &spi_flash_if_set_cs);
 }
@@ -142,6 +144,7 @@ void spi_flash_test(void) {
 static unsigned int measurement_errors = 0;
 static struct dsss_demod_state demod_state;
 static uint32_t freq_sample_ts = 0;
+static uint32_t debug_last_freq = 0;
 
 int main(void)
 {
@@ -152,14 +155,18 @@ int main(void)
 
     while (23) {
         if (adc_fft_buf_ready_idx != -1) {
+            /*
             float out;
             if (adc_buf_measure_freq(adc_fft_buf[adc_fft_buf_ready_idx], &out)) {
                 measurement_errors++;
                 continue;
             }
 
+            debug_last_freq = out;
+
             dsss_demod_init(&demod_state);
             dsss_demod_step(&demod_state, out, freq_sample_ts);
+            */
 
             freq_sample_ts++; /* TODO: also increase in case of freq measurement error? */
             adc_fft_buf_ready_idx = -1;