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SAMD20: SPI driver is code-complete, but untested

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This commit is contained in:
Gregory Nutt
2014-02-20 09:59:54 -06:00
parent e013c96358
commit 8bbf4f3ec8
7 changed files with 441 additions and 83 deletions
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arch/arm/src/samd/chip/sam_spi.h
+10 -7
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@@ -145,15 +145,18 @@
# define SPI_CTRLA_MODE_MASTER (3 << SPI_CTRLA_MODE_SHIFT) /* SPI master operation */
#define SPI_CTRLA_RUNSTDBY (1 << 7) /* Bit 7: Run in standby */
#define SPI_CTRLA_IBON (1 << 8) /* Bit 8: Immediate BUFOVF notification */
#define SPI_CTRLA_DOPO (1 << 16) /* Bit 16: Data out pinout */
# define SPI_CTRLA_DOPAD0 (0)
# define SPI_CTRLA_DOPAD2 SPI_CTRLA_DOPO
#define SPI_CTRLA_DOPO_SHIFT (16) /* Bit 16-17: Data out pinout */
#define SPI_CTRLA_DOPO_MASK (3 << SPI_CTRLA_DOPO_SHIFT) /* Bit 16-17: Data out pinout */
# define SPI_CTRLA_DOPO_DOPAD012 (0 << SPI_CTRLA_DOPO_SHIFT) /* D0=PAD0 SCK=PAD1 SS=PAD2 */
# define SPI_CTRLA_DOPO_DOPAD231 (1 << SPI_CTRLA_DOPO_SHIFT) /* D0=PAD2 SCK=PAD3 SS=PAD1 */
# define SPI_CTRLA_DOPO_DOPAD312 (2 << SPI_CTRLA_DOPO_SHIFT) /* D0=PAD3 SCK=PAD1 SS=PAD2 */
# define SPI_CTRLA_DOPO_DOPAD031 (3 << SPI_CTRLA_DOPO_SHIFT) /* D0=PAD0 SCK=PAD3 SS=PAD1 */
#define SPI_CTRLA_DIPO_SHIFT (20) /* Bits 20-21: Data in pinout */
#define SPI_CTRLA_DIPO_MASK (3 << SPI_CTRLA_DIPO_SHIFT)
# define SPI_CTRLA_DIPAD0 (0 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD[0] for DI */
# define SPI_CTRLA_DIPAD1 (1 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD[1] for DI */
# define SPI_CTRLA_DIPAD2 (2 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD[2] for DI */
# define SPI_CTRLA_DIPAD3 (3 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD[3] for DI */
# define SPI_CTRLA_DIPAD0 (0 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD0 for DI */
# define SPI_CTRLA_DIPAD1 (1 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD1 for DI */
# define SPI_CTRLA_DIPAD2 (2 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD2 for DI */
# define SPI_CTRLA_DIPAD3 (3 << SPI_CTRLA_DIPO_SHIFT) /* SERCOM PAD3 for DI */
#define SPI_CTRLA_FORM_SHIFT (24) /* Bits 24-27: Frame format */
#define SPI_CTRLA_FORM_MASK (7 << SPI_CTRLA_FORM_SHIFT)
# define SPI_CTRLA_FORM_SPI (0 << SPI_CTRLA_FORM_SHIFT) /* SPI frame (no address) */
arch/arm/src/samd/sam_lowputc.c
+3 -1
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@@ -56,6 +56,8 @@
#include "sam_config.h"
#include <arch/board/board.h>
#include "chip/sam_pm.h"
#include "chip/sam_gclk.h"
#include "chip/sam_usart.h"
@@ -301,7 +303,7 @@ int sam_usart_internal(const struct sam_usart_config_s * const config)
/* Configure the GCLKs for the SERCOM module */
sercom_coreclk_configure(config->sercom, config->gclkgen, false);
sercom_slowclk_configure(config->gclkgen);
sercom_slowclk_configure(BOARD_SERCOM_SLOW_GCLKGEN);
/* Set USART configuration according to the board configuration */
arch/arm/src/samd/sam_sercom.h
+3 -1
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@@ -44,7 +44,9 @@
#include <stdbool.h>
#include "up_arch.h"
#include "sam_config.h"
#include "chip/sam_pm.h"
/****************************************************************************
* Pre-processor Definitions
@@ -85,7 +87,7 @@ extern "C"
*
****************************************************************************/
static inline int sercom_enable(int sercom)
static inline void sercom_enable(int sercom)
{
uint32_t regval;
arch/arm/src/samd/sam_serial.c
+1 -1
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@@ -561,7 +561,7 @@ static int sam_interrupt(struct uart_dev_s *dev)
uint8_t intflag;
uint8_t inten;
/* Get the set of pending USART usarts (we are only interested in the
/* Get the set of pending USART interrupts (we are only interested in the
* unmasked interrupts).
*/
arch/arm/src/samd/sam_spi.c
+344 -52
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