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Diffstat (limited to 'firmware/drivers/ssp.h')
| -rw-r--r-- | firmware/drivers/ssp.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/firmware/drivers/ssp.h b/firmware/drivers/ssp.h new file mode 100644 index 0000000..c543422 --- /dev/null +++ b/firmware/drivers/ssp.h @@ -0,0 +1,121 @@ +/****************************************************************************
+ * $Id:: ssp.h 5741 2010-11-30 23:13:47Z usb00423 $
+ * Project: NXP LPC17xx SSP example
+ *
+ * Description:
+ * This file contains SSP code header definition.
+ *
+ ****************************************************************************
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * products. This software is supplied "AS IS" without any warranties.
+ * NXP Semiconductors assumes no responsibility or liability for the
+ * use of the software, conveys no license or title under any patent,
+ * copyright, or mask work right to the product. NXP Semiconductors
+ * reserves the right to make changes in the software without
+ * notification. NXP Semiconductors also make no representation or
+ * warranty that such application will be suitable for the specified
+ * use without further testing or modification.
+****************************************************************************/
+#ifndef __SSP_H__
+#define __SSP_H__
+
+/* There are there modes in SSP: loopback, master or slave. */
+/* Here are the combination of all the tests.
+(1) LOOPBACK test: LOOPBACK_MODE=1, TX_RX_ONLY=0, USE_CS=1;
+(2) Serial EEPROM test: LOOPBACK_MODE=0, TX_RX_ONLY=0, USE_CS=0; (default)
+(3) TX(Master) Only: LOOPBACK_MODE=0, SSP_SLAVE=0, TX_RX_ONLY=1, USE_CS=1;
+(4) RX(Slave) Only: LOOPBACK_MODE=0, SSP_SLAVE=1, TX_RX_ONLY=0, USE_CS=1 */
+
+#define LOOPBACK_MODE 0 /* 1 is loopback, 0 is normal operation. */
+#define SSP_SLAVE 0 /* 1 is SLAVE mode, 0 is master mode */
+#define TX_RX_ONLY 0 /* 1 is TX or RX only depending on SSP_SLAVE
+ flag, 0 is either loopback mode or communicate
+ with a serial EEPROM. */
+
+/* if USE_CS is zero, set SSEL as GPIO that you have total control of the sequence */
+/* When test serial SEEPROM(LOOPBACK_MODE=0, TX_RX_ONLY=0), set USE_CS to 0. */
+/* When LOOPBACK_MODE=1 or TX_RX_ONLY=1, set USE_CS to 1. */
+
+#define USE_CS 0
+
+/* SPI read and write buffer size */
+#define SSP_BUFSIZE 16
+#define FIFOSIZE 8
+
+#define DELAY_COUNT 10
+#define MAX_TIMEOUT 0xFF
+
+/* Port0.2 is the SSP select pin */
+#define SSP0_SEL (1 << 2)
+
+/* SSP Status register */
+#define SSPSR_TFE (1 << 0)
+#define SSPSR_TNF (1 << 1)
+#define SSPSR_RNE (1 << 2)
+#define SSPSR_RFF (1 << 3)
+#define SSPSR_BSY (1 << 4)
+
+/* SSP CR0 register */
+#define SSPCR0_DSS (1 << 0)
+#define SSPCR0_FRF (1 << 4)
+#define SSPCR0_SPO (1 << 6)
+#define SSPCR0_SPH (1 << 7)
+#define SSPCR0_SCR (1 << 8)
+
+/* SSP CR1 register */
+#define SSPCR1_LBM (1 << 0)
+#define SSPCR1_SSE (1 << 1)
+#define SSPCR1_MS (1 << 2)
+#define SSPCR1_SOD (1 << 3)
+
+/* SSP Interrupt Mask Set/Clear register */
+#define SSPIMSC_RORIM (1 << 0)
+#define SSPIMSC_RTIM (1 << 1)
+#define SSPIMSC_RXIM (1 << 2)
+#define SSPIMSC_TXIM (1 << 3)
+
+/* SSP0 Interrupt Status register */
+#define SSPRIS_RORRIS (1 << 0)
+#define SSPRIS_RTRIS (1 << 1)
+#define SSPRIS_RXRIS (1 << 2)
+#define SSPRIS_TXRIS (1 << 3)
+
+/* SSP0 Masked Interrupt register */
+#define SSPMIS_RORMIS (1 << 0)
+#define SSPMIS_RTMIS (1 << 1)
+#define SSPMIS_RXMIS (1 << 2)
+#define SSPMIS_TXMIS (1 << 3)
+
+/* SSP0 Interrupt clear register */
+#define SSPICR_RORIC (1 << 0)
+#define SSPICR_RTIC (1 << 1)
+
+/* ATMEL SEEPROM command set */
+#define WREN 0x06 /* MSB A8 is set to 0, simplifying test */
+#define WRDI 0x04
+#define RDSR 0x05
+#define WRSR 0x01
+#define READ 0x03
+#define WRITE 0x02
+
+/* RDSR status bit definition */
+#define RDSR_RDY 0x01
+#define RDSR_WEN 0x02
+
+/* If RX_INTERRUPT is enabled, the SSP RX will be handled in the ISR
+SSPReceive() will not be needed. */
+extern void SSP0_IRQHandler (void);
+extern void SSP1_IRQHandler (void);
+extern void SSP_SSELToggle( uint32_t portnum, uint32_t toggle );
+extern void SSP0Init( void );
+extern void SSP1Init( void );
+extern void SSP2Init( void );
+extern void SSPSend( uint32_t portnum, uint8_t *Buf, uint32_t Length );
+extern void SSPReceive( uint32_t portnum, uint8_t *buf, uint32_t Length );
+
+#endif /* __SSP_H__ */
+/*****************************************************************************
+** End Of File
+******************************************************************************/
+
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