make sound work

2025-08-16 23:06:15 +02:00
parent b71c83a5ca
commit f7c5959b0a
58 changed files with 25933 additions and 25820 deletions
@@ -0,0 +1,93 @@
+/* spi.h
+Copyright 2021 Carl John Kugler III
+
+Licensed under the Apache License, Version 2.0 (the License); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software distributed
+under the License is distributed on an AS IS BASIS, WITHOUT WARRANTIES OR
+CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+*/
+
+#pragma once
+
+#include <stdbool.h>
+//
+// Pico includes
+#include "hardware/dma.h"
+#include "hardware/gpio.h"
+#include "hardware/irq.h"
+#include "hardware/spi.h"
+#include "pico/mutex.h"
+#include "pico/sem.h"
+#include "pico/types.h"
+
+#define SPI_FILL_CHAR (0xFF)
+
+// "Class" representing SPIs
+typedef struct {
+    // SPI HW
+    spi_inst_t *hw_inst;
+    uint miso_gpio;  // SPI MISO GPIO number (not pin number)
+    uint mosi_gpio;
+    uint sck_gpio;
+    uint baud_rate;
+
+    // Drive strength levels for GPIO outputs.
+    // enum gpio_drive_strength { GPIO_DRIVE_STRENGTH_2MA = 0, GPIO_DRIVE_STRENGTH_4MA = 1, GPIO_DRIVE_STRENGTH_8MA = 2,
+    // GPIO_DRIVE_STRENGTH_12MA = 3 }
+    bool set_drive_strength;
+    enum gpio_drive_strength mosi_gpio_drive_strength;
+    enum gpio_drive_strength sck_gpio_drive_strength;
+
+    // State variables:
+    uint tx_dma;
+    uint rx_dma;
+    dma_channel_config tx_dma_cfg;
+    dma_channel_config rx_dma_cfg;
+    irq_handler_t dma_isr;
+    bool initialized;  
+    semaphore_t sem;
+    mutex_t mutex;    
+} spi_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// SPI DMA interrupts
+void __not_in_flash_func(spi_irq_handler)(spi_t *pSPI);
+  
+bool __not_in_flash_func(spi_transfer)(spi_t *pSPI, const uint8_t *tx, uint8_t *rx, size_t length);  
+void spi_lock(spi_t *pSPI);
+void spi_unlock(spi_t *pSPI);
+bool my_spi_init(spi_t *pSPI);
+void set_spi_dma_irq_channel(bool useChannel1, bool shared);
+
+#ifdef __cplusplus
+}
+#endif
+
+#ifndef NO_PICO_LED
+#  define USE_LED 1
+#endif
+
+#if USE_LED
+#  define LED_PIN 25
+#  define LED_INIT()                     \
+    {                                    \
+        gpio_init(LED_PIN);              \
+        gpio_set_dir(LED_PIN, GPIO_OUT); \
+    }
+#  define LED_ON() gpio_put(LED_PIN, 1)
+#  define LED_OFF() gpio_put(LED_PIN, 0)
+#else
+#  define LED_ON()
+#  define LED_OFF()
+#  define LED_INIT()
+#endif
+
+/* [] END OF FILE */