32 lines
938 B
C
32 lines
938 B
C
#ifndef __LPC17XX_SPI_H__
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#define __LPC17XX_SPI_H__
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#include <stdint.h>
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#include <stdbool.h>
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// if not use FIFO, R: 600kB/s, W: 500kB/s
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// if use FIFO, R: 1.2MB/s, W: 800kB/s
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#define USE_FIFO 1
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/* bit-frequency = PCLK / (CPSDVSR * [SCR+1]), here SCR=0, PCLK=72MHz, must be even */
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#define SPI_SPEED_20MHz 4 /* => 18MHz */
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#define SPI_SPEED_25MHz 4 /* => 18MHz */
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#define SPI_SPEED_400kHz 180 /* => 400kHz */
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/* external functions */
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void LPC17xx_SPI_Init (void);
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void LPC17xx_SPI_DeInit( void );
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void LPC17xx_SPI_Release (void);
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void LPC17xx_SPI_SetSpeed (uint8_t speed);
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void LPC17xx_SPI_Select (void);
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void LPC17xx_SPI_DeSelect (void);
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void LPC17xx_SPI_SendByte (uint8_t data);
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uint8_t LPC17xx_SPI_RecvByte (void);
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#if USE_FIFO
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void LPC17xx_SPI_RecvBlock_FIFO (uint8_t *buff, uint32_t btr);
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void LPC17xx_SPI_SendBlock_FIFO (const uint8_t *buff);
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#endif
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#endif // __LPC17XX_SPI_H__
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