tmp: creating specific modules for 8 channels & 16 channels

lightsabre_backend/led_driver/lib/src/leddriver/rpi_leddriver.c

@@ -47,6 +47,12 @@ MEM_MAP vc_mem;
 TXDATA_T *txdata;
 TXDATA_T tx_buffer[TX_BUFF_LEN(CHAN_MAXLEDS)];
 
+#if LED_NCHANS <= 8
+TXDATA_T tx_send_buffer[TX_BUFF_SIZE(CHAN_MAXLEDS)];
+#else
+TXDATA_T *tx_send_buffer = tx_buffer;
+#endif /* LED_NCHANS <= 8 */
+
 void swap_bytes();
 
 void leddriver_setup() {
@@ -113,7 +119,7 @@ void leddriver_refresh() {
     usleep(10);
   }
 
-  memcpy(txdata, tx_buffer, TX_BUFF_SIZE(CHAN_MAXLEDS));
+  memcpy(txdata, tx_send_buffer, TX_BUFF_SIZE(CHAN_MAXLEDS));
   enable_dma(DMA_CHAN_A);
   start_smi(&vc_mem);
   usleep(10);
@@ -122,11 +128,13 @@ void leddriver_refresh() {
 // Swap adjacent bytes in transmit data
 void swap_bytes() {
   uint16_t *wp = (uint16_t *)tx_buffer;
+  uint16_t *wp_dest = (uint16_t *)tx_send_buffer;
   int len = TX_BUFF_SIZE(CHAN_MAXLEDS);
 
   len = (len + 1) / 2;
   while (len-- > 0) {
-    *wp = __builtin_bswap16(*wp);
+    *wp_dest = __builtin_bswap16(*wp);
+    wp_dest++;
     wp++;
   }
 }

lightsabre_backend/led_driver/lib/wrapper.h

@@ -1,9 +1,13 @@
 #include "include/log.h"
-#include "src/leddriver/rpi_leddriver.h"
+// #include "src/leddriver/rpi_leddriver.h"
 #include "src/common.h"
+#include "src/dma/rpi_dma.h"
+#include "src/dma/rpi_videocore.h"
+#include "src/smi/rpi_smi.h"
+#include "src/gpio/rpi_gpio.h"
+
 
 #define CHAN_MAXLEDS 60 // Maximum number of LEDs per channel
-#define LED_NCHANS 8    // Number of LED channels (8 or 16)
 
 #define TX_TEST 0      // If non-zero, use dummy Tx data
 #define LED_NBITS 24   // Number of data bits per LED
@@ -11,8 +15,9 @@
 #define LED_POSTBITS 4 // Number of zero bits after LED data
 #define BIT_NPULSES 3  // Number of O/P pulses per LED bit
 
-// Length of data for 1 row (1 LED on each channel)
+// // Length of data for 1 row (1 LED on each channel)
 #define LED_DLEN (LED_NBITS * BIT_NPULSES)
+#define LED_NCHANS 8 // Number of channels, 8 or 16
 
 // Transmit data type, 8 or 16 bits
 #if LED_NCHANS > 8
@@ -21,14 +26,19 @@ typedef uint16_t TXDATA_T;
 typedef uint8_t TXDATA_T;
 #endif
 
-// Ofset into Tx data buffer, given LED number in chan
+
+// // Ofset into Tx data buffer, given LED number in chan
 #define LED_TX_OSET(n) (LED_PREBITS + (LED_DLEN * (n)))
 
-// Size of data buffers & NV memory, given number of LEDs per chan
+// // Size of data buffers & NV memory, given number of LEDs per chan
 #define TX_BUFF_LEN(n) (LED_TX_OSET(n) + LED_POSTBITS)
 #define TX_BUFF_SIZE(n) (TX_BUFF_LEN(n) * sizeof(TXDATA_T))
+
+#define PAGE_SIZE 0x1000
 #define VC_MEM_SIZE (PAGE_SIZE + TX_BUFF_SIZE(CHAN_MAXLEDS))
 
-extern TXDATA_T tx_buffer[TX_BUFF_LEN(CHAN_MAXLEDS)];
+
+// extern TXDATA_T tx_buffer[TX_BUFF_LEN(CHAN_MAXLEDS)];
+extern TXDATA_T tx_send_buffer[TX_BUFF_LEN(CHAN_MAXLEDS)];
 extern TXDATA_T *txdata;
 extern MEM_MAP vc_mem;