moving standalone mode to alsa rust direct binding crate & moving led_driver to a specific package

2025-08-04 16:37:40 +00:00
parent 66c4aeffa6
commit 57ace1383b
52 changed files with 859 additions and 577 deletions
@@ -0,0 +1,33 @@
+#if !defined(__RPI_DMA_H__)
+#define __RPI_DMA_H__
+
+#include <stdint.h>
+
+#include "../common.h"
+
+#define DMA_CHAN_A 10
+#define DMA_CHAN_B 11
+
+// DMA control block (must be 32-byte aligned)
+typedef struct {
+  uint32_t ti, // Transfer info
+      srce_ad, // Source address
+      dest_ad, // Destination address
+      tfr_len, // Transfer length
+      stride,  // Transfer stride
+      next_cb, // Next control block
+      debug,   // Debug register, zero in control block
+      unused;
+} DMA_CB __attribute__((aligned(32)));
+
+void dma_setup(MEM_MAP *mp, int chan, int nsamp, uint8_t **txdata, int offset, uint32_t dest_ad);
+void dma_close();
+
+void enable_dma(int chan);
+void start_dma(MEM_MAP *mp, int chan, DMA_CB *cbp, uint32_t csval);
+uint32_t dma_transfer_len(int chan);
+uint32_t dma_active(int chan);
+void stop_dma(int chan);
+void disp_dma(int chan);
+
+#endif // __RPI_DMA_H__