diff options
| author | Harald Welte <laforge@gnumonks.org> | 2012-08-19 10:41:20 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2012-08-19 10:41:20 +0200 |
| commit | 141486b128b7ebebcf032d5e172e171e95839c01 (patch) | |
| tree | cbc3528d0e064af81016e9b37dec747f0f99883a /src | |
| parent | a7bab9ef29a17e7e5dd516cc4aa00a85cb26b301 (diff) | |
Add nCS function to SPI driver and properly initialize GPIOs for SPI mode
Diffstat (limited to 'src')
| -rw-r--r-- | src/cc32/board.h | 6 | ||||
| -rw-r--r-- | src/cc32/cc32_spi.c | 19 | ||||
| -rw-r--r-- | src/cc32/cc32_spi.h | 1 |
3 files changed, 26 insertions, 0 deletions
diff --git a/src/cc32/board.h b/src/cc32/board.h new file mode 100644 index 0000000..da129b3 --- /dev/null +++ b/src/cc32/board.h @@ -0,0 +1,6 @@ +#ifndef _BOARD_H +#define _BOARD_H + +#define BOARD_GPIO_SPI_NCS 11 + +#endif /* _BOARD_H */ diff --git a/src/cc32/cc32_spi.c b/src/cc32/cc32_spi.c index 03aca17..1c55ed3 100644 --- a/src/cc32/cc32_spi.c +++ b/src/cc32/cc32_spi.c @@ -21,6 +21,8 @@ #include "cc32_sysc.h" #include "cc32_spi.h" +#include "cc32_gpio.h" +#include "board.h" #define CC32_SPI_BASE 0x0f9800 @@ -64,6 +66,18 @@ int cc32_spi_init(uint8_t cpol, uint8_t cpha, uint8_t divide_2n) cc32_sysc_clk_enable(CLK_SPI); + /* configure GPIOs as output */ + cc32_gpio_output(24, 1); + cc32_gpio_output(25, 1); + cc32_gpio_output(26, 1); + /* configure P3 as SPI function */ + cc32_gpio_alt(CC32_GPIO_P3, CC32_GPIO_FUNC2); + + /* configure GPIO11 as output (SPI_nCS) */ + cc32_gpio_output(BOARD_GPIO_SPI_NCS, 1); + /* set to 1 (disable) */ + cc32_gpio_set(BOARD_GPIO_SPI_NCS, 1); + if (divide_2n < 2 || divide_2n > 256) return -EINVAL; @@ -80,3 +94,8 @@ int cc32_spi_xcv_byte(uint8_t tx) while (!(*SPI_REG(SPISTS) & SPISTS_BOVER)) { } return *SPI_REG(SPIDAT); } + +int cc32_spi_ncs(uint8_t high) +{ + cc32_gpio_set(BOARD_GPIO_SPI_NCS, high); +} diff --git a/src/cc32/cc32_spi.h b/src/cc32/cc32_spi.h index 873ffc1..917c721 100644 --- a/src/cc32/cc32_spi.h +++ b/src/cc32/cc32_spi.h @@ -5,5 +5,6 @@ int cc32_spi_init(uint8_t cpol, uint8_t cpha, uint8_t divide_2n); int cc32_spi_xcv_byte(uint8_t tx); +int cc32_spi_ncs(uint8_t high); #endif |