82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/**
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* @file disp_spi.h
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*
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*/
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#ifndef DISP_SPI_H
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#define DISP_SPI_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*********************
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* INCLUDES
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*********************/
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#include <stdint.h>
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#include <stdbool.h>
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#include <driver/spi_master.h>
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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typedef enum _disp_spi_send_flag_t {
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DISP_SPI_SEND_QUEUED = 0x00000000,
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DISP_SPI_SEND_POLLING = 0x00000001,
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DISP_SPI_SEND_SYNCHRONOUS = 0x00000002,
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DISP_SPI_SIGNAL_FLUSH = 0x00000004,
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DISP_SPI_RECEIVE = 0x00000008,
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DISP_SPI_CMD_8 = 0x00000010, /* Reserved */
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DISP_SPI_CMD_16 = 0x00000020, /* Reserved */
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DISP_SPI_ADDRESS_8 = 0x00000040,
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DISP_SPI_ADDRESS_16 = 0x00000080,
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DISP_SPI_ADDRESS_24 = 0x00000100,
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DISP_SPI_ADDRESS_32 = 0x00000200,
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DISP_SPI_MODE_DIO = 0x00000400,
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DISP_SPI_MODE_QIO = 0x00000800,
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DISP_SPI_MODE_DIOQIO_ADDR = 0x00001000,
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DISP_SPI_VARIABLE_DUMMY = 0x00002000,
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} disp_spi_send_flag_t;
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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void disp_spi_add_device(spi_host_device_t host);
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void disp_spi_add_device_config(spi_host_device_t host, spi_device_interface_config_t *devcfg);
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void disp_spi_add_device_with_speed(spi_host_device_t host, int clock_speed_hz);
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void disp_spi_change_device_speed(int clock_speed_hz);
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void disp_spi_remove_device();
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/* Important!
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All buffers should also be 32-bit aligned and DMA capable to prevent extra allocations and copying.
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When DMA reading (even in polling mode) the ESP32 always read in 4-byte chunks even if less is requested.
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Extra space will be zero filled. Always ensure the out buffer is large enough to hold at least 4 bytes!
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*/
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void disp_spi_transaction(const uint8_t *data, size_t length,
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disp_spi_send_flag_t flags, uint8_t *out, uint64_t addr, uint8_t dummy_bits);
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void disp_wait_for_pending_transactions(void);
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void disp_spi_acquire(void);
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void disp_spi_release(void);
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static inline void disp_spi_send_data(uint8_t *data, size_t length) {
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disp_spi_transaction(data, length, DISP_SPI_SEND_POLLING, NULL, 0, 0);
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}
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static inline void disp_spi_send_colors(uint8_t *data, size_t length) {
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disp_spi_transaction(data, length,
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DISP_SPI_SEND_QUEUED | DISP_SPI_SIGNAL_FLUSH,
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NULL, 0, 0);
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}
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /*DISP_SPI_H*/
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