spi: initialize spi_dev array

avoids hitting an infitine loop while waiting on spi1 in the dshot driver.

src/driver/spi.c

@@ -5,7 +5,9 @@
 #include "core/failloop.h"
 #include "driver/interrupt.h"
 
-FAST_RAM spi_device_t spi_dev[SPI_PORT_MAX];
+FAST_RAM spi_device_t spi_dev[SPI_PORT_MAX] = {
+    [RANGE_INIT(0, SPI_PORT_MAX)] = {.is_init = false, .dma_done = true, .txn_head = 0, .txn_tail = 0},
+};
 FAST_RAM spi_txn_t txn_pool[SPI_TXN_MAX];
 DMA_RAM uint8_t txn_buffers[SPI_TXN_MAX][DMA_ALIGN(512)];
 

src/driver/spi.h

@@ -106,12 +106,13 @@ typedef struct {
   bool is_init;
   volatile bool dma_done;
 
-  spi_txn_t *txns[SPI_TXN_MAX];
   // only modified by the main loop
   volatile uint8_t txn_head;
   // only modified by the intterupt or protected code
   volatile uint8_t txn_tail;
 
+  spi_txn_t *txns[SPI_TXN_MAX];
+
   spi_mode_t mode;
   uint32_t hz;
 } spi_device_t;
@@ -137,7 +138,7 @@ static inline void spi_bus_device_reconfigure(spi_bus_device_t *bus, spi_mode_t
   bus->hz = hz;
 }
 
-static inline uint8_t spi_dma_is_ready(spi_ports_t port) {
+static inline bool spi_dma_is_ready(spi_ports_t port) {
   const spi_device_t *dev = &spi_dev[port];
   return dev->dma_done;
 }

src/driver/spi_sdcard.c

@@ -299,7 +299,7 @@ sdcard_status_t sdcard_update() {
       break;
     }
 
-    const uint8_t buf[20] = {[0 ... 19] = 0xff};
+    const uint8_t buf[20] = {[RANGE_INIT(0, 20)] = 0xff};
     const spi_txn_segment_t segs[] = {
         spi_make_seg_buffer(NULL, buf, 20),
     };

src/util/util.h

@@ -44,6 +44,9 @@
 
 #define MAKE_SEMVER(major, minor, patch) ((major << 16) | (minor << 8) | patch)
 
+// workaround for vscode not reconginzing this synatx
+#define RANGE_INIT(start, end) start...(end - 1)
+
 float mapf(float x, float in_min, float in_max, float out_min, float out_max);
 
 float atan2approx(float y, float x);