5 files changed, 51 insertions, 4 deletions
diff --git a/controller/fw/src/adc.c b/controller/fw/src/adc.c
index 81f5ac1..027fd11 100644
--- a/controller/fw/src/adc.c
+++ b/controller/fw/src/adc.c
@@ -6,6 +6,7 @@
 #include "adc.h"
 #include "sr_global.h"
 
+static unsigned int adc_overruns = 0;
 uint16_t adc_fft_buf[2][FMEAS_FFT_LEN];
 volatile int adc_fft_buf_ready_idx = -1;
 
@@ -93,6 +94,7 @@ void DMA2_Stream0_IRQHandler(void) {
             GPIOA->BSRR = 1<<11<<16;
             /* clear all flags */
             adc_dma->LIFCR = isr<<DMA_LISR_FEIF0_Pos;
+            adc_overruns++;
             return;
             panic();
         }
diff --git a/controller/fw/src/con_usart.h b/controller/fw/src/con_usart.h
index a1ad963..db73f0d 100644
--- a/controller/fw/src/con_usart.h
+++ b/controller/fw/src/con_usart.h
@@ -6,9 +6,10 @@
 extern volatile struct usart_desc con_usart;
 
 #define con_printf(...) usart_printf(&con_usart, __VA_ARGS__)
+#define con_printf_blocking(...) usart_printf_blocking(&con_usart, __VA_ARGS__)
 
 #ifndef CON_USART_BAUDRATE
-#define CON_USART_BAUDRATE 115200
+#define CON_USART_BAUDRATE 500000
 #endif
 
 void con_usart_init(void);
diff --git a/controller/fw/src/main.c b/controller/fw/src/main.c
index b100b16..6589297 100644
--- a/controller/fw/src/main.c
+++ b/controller/fw/src/main.c
@@ -197,7 +197,7 @@ int main(void)
 
     clock_setup();
     con_usart_init();
-    con_printf("\033[2J\033[HBooting...\r\n");
+    con_printf("\033[0m\033[2J\033[HBooting...\r\n");
 
     led_setup();
     spi_flash_setup();
@@ -217,9 +217,22 @@ int main(void)
     while (23) {
         if (adc_fft_buf_ready_idx != -1) {
             GPIOA->BSRR = 1<<11;
-            adc_fft_buf_ready_idx = !adc_fft_buf_ready_idx; /* DEBUG */
-            memcpy(adc_fft_buf[!adc_fft_buf_ready_idx], adc_fft_buf[adc_fft_buf_ready_idx] + FMEAS_FFT_LEN/2, sizeof(adc_fft_buf[0][0]) * FMEAS_FFT_LEN/2);
+            //adc_fft_buf_ready_idx = !adc_fft_buf_ready_idx; /* DEBUG */
+            //DEBUG:
+            //memcpy(adc_fft_buf[!adc_fft_buf_ready_idx], adc_fft_buf[adc_fft_buf_ready_idx] + FMEAS_FFT_LEN/2, sizeof(adc_fft_buf[0][0]) * FMEAS_FFT_LEN/2);
+
+            for (int i=0; i<168*1000*2; i++)
+                asm volatile ("nop");
+            /* BEGIN DEBUG */
+            con_printf_blocking("\r\n%06d: ", freq_sample_ts);
+            int old_idx = adc_fft_buf_ready_idx;
+            for (int i=0; i<FMEAS_FFT_LEN/2; i++)
+                con_printf_blocking("%03x ", adc_fft_buf[old_idx][FMEAS_FFT_LEN/2 + i]);
+            adc_fft_buf_ready_idx = -1;
+            freq_sample_ts++; /* TODO: also increase in case of freq measurement error? */
             GPIOA->BSRR = 1<<11<<16;
+            continue;
+            /* END DEBUG */
 
             GPIOA->BSRR = 1<<11;
             float out;
diff --git a/controller/fw/src/serial.c b/controller/fw/src/serial.c
index 71e1868..2d09f80 100644
--- a/controller/fw/src/serial.c
+++ b/controller/fw/src/serial.c
@@ -11,6 +11,8 @@
 static void usart_schedule_dma(volatile struct usart_desc *us);
 static void usart_dma_reset(volatile struct usart_desc *us);
 static void usart_putc_nonblocking_tpf(void *us, char c);
+static void usart_wait_chunk_free(volatile struct usart_desc *us);
+static void usart_putc_blocking_tpf(void *us, char c);
 
 void usart_dma_reset(volatile struct usart_desc *us) {
     us->tx_buf.xfr_start = -1;
@@ -117,10 +119,24 @@ int usart_putc_nonblocking(volatile struct usart_desc *us, char c) {
     return 0;
 }
 
+int usart_putc_blocking(volatile struct usart_desc *us, char c) {
+    volatile struct dma_tx_buf *buf = &us->tx_buf;
+
+    while (buf->wr_pos == buf->xfr_start)
+        ;
+
+    buf->data[buf->wr_pos] = c;
+    buf->wr_pos = (buf->wr_pos + 1) % sizeof(us->data);
+    return 0;
+}
+
 void usart_putc_nonblocking_tpf(void *us, char c) {
     usart_putc_nonblocking((struct usart_desc *)us, c);
 }
 
+void usart_putc_blocking_tpf(void *us, char c) {
+    usart_putc_blocking((struct usart_desc *)us, c);
+}
 
 int usart_send_chunk_nonblocking(volatile struct usart_desc *us, const char *chunk, size_t chunk_len) {
     for (size_t i=0; i<chunk_len; i++)
@@ -129,6 +145,11 @@ int usart_send_chunk_nonblocking(volatile struct usart_desc *us, const char *chu
     return usart_flush(us);
 }
 
+void usart_wait_chunk_free(volatile struct usart_desc *us) {
+    while (us->tx_buf.chunk_end[us->tx_buf.wr_idx] != -1)
+        ;
+}
+
 int usart_flush(volatile struct usart_desc *us) {
     /* Find a free slot for this chunk */
     if (us->tx_buf.chunk_end[us->tx_buf.wr_idx] != -1) {
@@ -151,3 +172,11 @@ int usart_printf(volatile struct usart_desc *us, char *fmt, ...) {
     return usart_flush(us);
 }
 
+int usart_printf_blocking(volatile struct usart_desc *us, char *fmt, ...) {
+    va_list va;
+    va_start(va, fmt);
+    tfp_format((void *)us, usart_putc_blocking_tpf, fmt, va);
+    usart_wait_chunk_free(us);
+    return usart_flush(us);
+}
+
diff --git a/controller/fw/src/serial.h b/controller/fw/src/serial.h
index 02f6f5d..bad4374 100644
--- a/controller/fw/src/serial.h
+++ b/controller/fw/src/serial.h
@@ -74,9 +74,11 @@ struct usart_desc {
 void usart_dma_init(volatile struct usart_desc *us, unsigned int baudrate);
 int usart_send_chunk_nonblocking(volatile struct usart_desc *us, const char *chunk, size_t chunk_len);
 int usart_putc_nonblocking(volatile struct usart_desc *us, char c);
+int usart_putc_blocking(volatile struct usart_desc *us, char c);
 
 void usart_dma_stream_irq(volatile struct usart_desc *us);
 int usart_flush(volatile struct usart_desc *us);
 int usart_printf(volatile struct usart_desc *us, char *fmt, ...);
+int usart_printf_blocking(volatile struct usart_desc *us, char *fmt, ...);
 
 #endif // __SERIAL_H__