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[KINETIS] Initial K20 serial driver (Not working yet - WIP) 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7147 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
utzig 2014-08-07 02:03:36 +00:00
parent 543196b9c7
commit 8203b6596a
3 changed files with 517 additions and 0 deletions
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1
os/hal/ports/KINETIS/K20x/platform.mk
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PLATFORMSRC = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \
${CHIBIOS}/os/hal/ports/KINETIS/K20x/hal_lld.c \
${CHIBIOS}/os/hal/ports/KINETIS/K20x/pal_lld.c \
${CHIBIOS}/os/hal/ports/KINETIS/K20x/serial_lld.c \
${CHIBIOS}/os/hal/ports/KINETIS/K20x/st_lld.c
# Required include directories

353
os/hal/ports/KINETIS/K20x/serial_lld.c Normal file
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/*
ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file K20x/serial_lld.c
* @brief Kinetis K20x Serial Driver subsystem low level driver source.
*
* @addtogroup SERIAL
* @{
*/
#include "osal.h"
#include "hal.h"
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
#include "mk20d5.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief SD1 driver identifier.
*/
#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
SerialDriver SD1;
#endif
#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
SerialDriver SD2;
#endif
#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
SerialDriver SD3;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/**
* @brief Driver default configuration.
*/
static const SerialConfig default_config = {
38400
};
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Common IRQ handler.
* @note Tries hard to clear all the pending interrupt sources, we don't
* want to go through the whole ISR and have another interrupt soon
* after.
*
* @param[in] u pointer to an UART I/O block
* @param[in] sdp communication channel associated to the UART
*/
static void serve_interrupt(SerialDriver *sdp) {
UART_TypeDef *u = sdp->uart;
uint8_t s1 = u->S1;
if (s1 & UARTx_S1_RDRF) {
osalSysLockFromISR();
if (chIQIsEmptyI(&sdp->iqueue))
chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
if (chIQPutI(&sdp->iqueue, u->D) < Q_OK)
chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
osalSysUnlockFromISR();
}
if (s1 & UARTx_S1_TDRE) {
msg_t b;
osalSysLockFromISR();
b = chOQGetI(&sdp->oqueue);
osalSysUnlockFromISR();
if (b < Q_OK) {
osalSysLockFromISR();
chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
osalSysUnlockFromISR();
u->C2 &= ~UARTx_C2_TIE;
} else {
u->D = b;
}
}
while (u->S1)
(void)u->D;
}
/**
* @brief Attempts a TX preload
*/
static void preload(SerialDriver *sdp) {
UART_TypeDef *u = sdp->uart;
if (u->S1 & UARTx_S1_TDRE) {
msg_t b = chOQGetI(&sdp->oqueue);
if (b < Q_OK) {
chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
return;
}
u->D = b;
u->C2 |= UARTx_C2_TIE;
}
}
/**
* @brief Driver output notification.
*/
#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
static void notify1(io_queue_t *qp)
{
(void)qp;
preload(&SD1);
}
#endif
#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
static void notify2(io_queue_t *qp)
{
(void)qp;
preload(&SD2);
}
#endif
#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
static void notify3(io_queue_t *qp)
{
(void)qp;
preload(&SD3);
}
#endif
/**
* @brief Common UART configuration.
*
*/
static void configure_uart(UART_TypeDef *uart, const SerialConfig *config)
{
uint16_t sbr, brfa;
uint32_t clock;
/* Disable UART while configuring */
uart->C2 &= ~(UARTx_C2_RE | UARTx_C2_TE);
uart->C1 = 0;
//while (uart->S1 & UARTx_S1_RDRF) {
// (void)uart->D;
//}
clock = KINETIS_SYSCLK_FREQUENCY / 4;
sbr = (uint16_t) clock / (config->sc_speed * 16);
brfa = (uint16_t) (2 * clock * config->sc_speed) - (sbr * 32);
//uart->BDH = UARTx_BDH_SBR(sbr >> 8) | (uart->BDH & ~UARTx_BDH_SBR_MASK);
uart->BDH = 0;
uart->BDL = sbr;
uart->C4 = UARTx_C4_BRFA(brfa) | (uart->C4 & ~UARTx_C4_BRFA_MASK);
uart->TWFIFO = 1;
uart->RWFIFO = 1;
//uart->C2 |= UARTx_C2_RE | UARTx_C2_RIE | UARTx_C2_TE;
uart->C2 |= UARTx_C2_RE | UARTx_C2_TE;
uart->C3 = 0;
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '1';
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '2';
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '3';
//uart->C3 = UARTx_C3_ORIE | UARTx_C3_NEIE | UARTx_C3_FEIE | UARTx_C3_PEIE;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/* TODO:
* UART0_Error is Vector84
* UART1_Error is Vector8C
* UART2_Error is Vector94
*/
#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
CH_IRQ_HANDLER(Vector80) {
CH_IRQ_PROLOGUE();
serve_interrupt(&SD1);
CH_IRQ_EPILOGUE();
}
#endif
#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
CH_IRQ_HANDLER(Vector88) {
CH_IRQ_PROLOGUE();
serve_interrupt(&SD2);
CH_IRQ_EPILOGUE();
}
#endif
#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
CH_IRQ_HANDLER(Vector90) {
CH_IRQ_PROLOGUE();
serve_interrupt(&SD3);
CH_IRQ_EPILOGUE();
}
#endif
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level serial driver initialization.
*
* @notapi
*/
void sd_lld_init(void) {
#if KINETIS_SERIAL_USE_UART0
/* Driver initialization.*/
sdObjectInit(&SD1, NULL, notify1);
SD1.uart = UART0;
#endif
#if KINETIS_SERIAL_USE_UART1
/* Driver initialization.*/
sdObjectInit(&SD2, NULL, notify2);
SD2.uart = UART1;
#endif
#if KINETIS_SERIAL_USE_UART2
/* Driver initialization.*/
sdObjectInit(&SD3, NULL, notify3);
SD3.uart = UART2;
#endif
}
/**
* @brief Low level serial driver configuration and (re)start.
*
* @param[in] sdp pointer to a @p SerialDriver object
* @param[in] config the architecture-dependent serial driver configuration.
* If this parameter is set to @p NULL then a default
* configuration is used.
*
* @notapi
*/
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
if (config == NULL)
config = &default_config;
if (sdp->state == SD_STOP) {
/* Enables the peripheral.*/
#if KINETIS_SERIAL_USE_UART0
if (sdp == &SD1) {
SIM->SCGC4 |= SIM_SCGC4_UART0;
configure_uart(sdp->uart, config);
//nvicEnableVector(UART0Status_IRQn, KINETIS_SERIAL_UART0_PRIORITY);
}
#endif /* KINETIS_SERIAL_USE_UART0 */
#if KINETIS_SERIAL_USE_UART1
if (sdp == &SD2) {
SIM->SCGC4 |= SIM_SCGC4_UART1;
configure_uart(sdp->uart, config);
nvicEnableVector(UART1Status_IRQn, KINETIS_SERIAL_UART1_PRIORITY);
}
#endif /* KINETIS_SERIAL_USE_UART1 */
#if KINETIS_SERIAL_USE_UART2
if (sdp == &SD3) {
SIM->SCGC4 |= SIM_SCGC4_UART2;
configure_uart(sdp->uart, config);
nvicEnableVector(UART2Status_IRQn, KINETIS_SERIAL_UART2_PRIORITY);
}
#endif /* KINETIS_SERIAL_USE_UART2 */
}
/* Configures the peripheral.*/
}
/**
* @brief Low level serial driver stop.
* @details De-initializes the USART, stops the associated clock, resets the
* interrupt vector.
*
* @param[in] sdp pointer to a @p SerialDriver object
*
* @notapi
*/
void sd_lld_stop(SerialDriver *sdp) {
if (sdp->state == SD_READY) {
/* TODO: Resets the peripheral.*/
#if KINETIS_SERIAL_USE_UART0
if (sdp == &SD1) {
nvicDisableVector(UART0Status_IRQn);
SIM->SCGC4 &= ~SIM_SCGC4_UART0;
}
#endif
#if KINETIS_SERIAL_USE_UART1
if (sdp == &SD2) {
nvicDisableVector(UART1Status_IRQn);
SIM->SCGC4 &= ~SIM_SCGC4_UART1;
}
#endif
#if KINETIS_SERIAL_USE_UART2
if (sdp == &SD3) {
nvicDisableVector(UART2Status_IRQn);
SIM->SCGC4 &= ~SIM_SCGC4_UART2;
}
#endif
}
}
#endif /* HAL_USE_SERIAL */
/** @} */

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os/hal/ports/KINETIS/K20x/serial_lld.h Normal file
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/*
ChibiOS/RT - Copyright (C) 2006-2014 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file K20x/serial_lld.h
* @brief Kinetis K20x Serial Driver subsystem low level driver header.
*
* @addtogroup SERIAL
* @{
*/
#ifndef _SERIAL_LLD_H_
#define _SERIAL_LLD_H_
#if HAL_USE_SERIAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief SD1 driver enable switch.
* @details If set to @p TRUE the support for SD1 is included.
*/
#if !defined(KINETIS_SERIAL_USE_UART0) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_USE_UART0 FALSE
#endif
/**
* @brief SD2 driver enable switch.
* @details If set to @p TRUE the support for SD2 is included.
*/
#if !defined(KINETIS_SERIAL_USE_UART1) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_USE_UART1 FALSE
#endif
/**
* @brief SD3 driver enable switch.
* @details If set to @p TRUE the support for SD3 is included.
*/
#if !defined(KINETIS_SERIAL_USE_UART2) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_USE_UART2 FALSE
#endif
/**
* @brief UART0 interrupt priority level setting.
*/
#if !defined(KINETIS_SERIAL_UART0_PRIORITY) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_UART0_PRIORITY 12
#endif
/**
* @brief UART1 interrupt priority level setting.
*/
#if !defined(KINETIS_SERIAL_UART1_PRIORITY) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_UART1_PRIORITY 12
#endif
/**
* @brief UART2 interrupt priority level setting.
*/
#if !defined(KINETIS_SERIAL_UART2_PRIORITY) || defined(__DOXYGEN__)
#define KINETIS_SERIAL_UART2_PRIORITY 12
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Generic Serial Driver configuration structure.
* @details An instance of this structure must be passed to @p sdStart()
* in order to configure and start a serial driver operations.
* @note Implementations may extend this structure to contain more,
* architecture dependent, fields.
*/
typedef struct {
/**
* @brief Bit rate.
*/
uint32_t sc_speed;
/* End of the mandatory fields.*/
} SerialConfig;
/**
* @brief @p SerialDriver specific data.
*/
#define _serial_driver_data \
_base_asynchronous_channel_data \
/* Driver state.*/ \
sdstate_t state; \
/* Input queue.*/ \
input_queue_t iqueue; \
/* Output queue.*/ \
output_queue_t oqueue; \
/* Input circular buffer.*/ \
uint8_t ib[SERIAL_BUFFERS_SIZE]; \
/* Output circular buffer.*/ \
uint8_t ob[SERIAL_BUFFERS_SIZE]; \
/* End of the mandatory fields.*/ \
/* Pointer to the UART registers block.*/ \
UART_TypeDef *uart;
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if KINETIS_SERIAL_USE_UART0 && !defined(__DOXYGEN__)
extern SerialDriver SD1;
#endif
#if KINETIS_SERIAL_USE_UART1 && !defined(__DOXYGEN__)
extern SerialDriver SD2;
#endif
#if KINETIS_SERIAL_USE_UART2 && !defined(__DOXYGEN__)
extern SerialDriver SD3;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void sd_lld_init(void);
void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
void sd_lld_stop(SerialDriver *sdp);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SERIAL */
#endif /* _SERIAL_LLD_H_ */
/** @} */