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circuitpython/cc3200/hal/cc3200_hal.c

226 lines
7.3 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/******************************************************************************
IMPORTS
******************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "py/mpstate.h"
#include "py/mphal.h"
#include "py/runtime.h"
#include "py/objstr.h"
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_nvic.h"
#include "hw_memmap.h"
#include "rom_map.h"
#include "interrupt.h"
#include "systick.h"
#include "prcm.h"
#include "pin.h"
#include "mpexception.h"
#include "telnet.h"
#include "pybuart.h"
#include "utils.h"
#include "irq.h"
#include "moduos.h"
#ifdef USE_FREERTOS
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#endif
/******************************************************************************
DECLARE PRIVATE FUNCTIONS
******************************************************************************/
#ifndef USE_FREERTOS
static void hal_TickInit (void);
#endif
/******************************************************************************
DECLARE LOCAL DATA
******************************************************************************/
static volatile uint32_t HAL_tickCount;
/******************************************************************************
DECLARE IMPORTED DATA
******************************************************************************/
extern void (* const g_pfnVectors[256])(void);
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
__attribute__ ((section (".boot")))
void HAL_SystemInit (void) {
MAP_IntVTableBaseSet((unsigned long)&g_pfnVectors[0]);
// in the case of a release image, these steps are already performed by
// the bootloader so we can skip it and gain some code space
#ifdef DEBUG
MAP_IntMasterEnable();
PRCMCC3200MCUInit();
#endif
#ifndef USE_FREERTOS
hal_TickInit();
#endif
}
void HAL_SystemDeInit (void) {
}
void HAL_IncrementTick(void) {
HAL_tickCount++;
}
mp_uint_t mp_hal_ticks_ms(void) {
return HAL_tickCount;
}
// The SysTick timer counts down at HAL_FCPU_HZ, so we can use that knowledge
// to grab a microsecond counter.
mp_uint_t mp_hal_ticks_us(void) {
mp_uint_t irq_state = disable_irq();
uint32_t counter = SysTickValueGet();
uint32_t milliseconds = mp_hal_ticks_ms();
enable_irq(irq_state);
uint32_t load = SysTickPeriodGet();
counter = load - counter; // Convert from decrementing to incrementing
return (milliseconds * 1000) + ((counter * 1000) / load);
}
void mp_hal_delay_ms(mp_uint_t delay) {
// only if we are not within interrupt context and interrupts are enabled
if ((HAL_NVIC_INT_CTRL_REG & HAL_VECTACTIVE_MASK) == 0 && query_irq() == IRQ_STATE_ENABLED) {
MP_THREAD_GIL_EXIT();
#ifdef USE_FREERTOS
vTaskDelay (delay / portTICK_PERIOD_MS);
#else
uint32_t start = HAL_tickCount;
// wraparound of tick is taken care of by 2's complement arithmetic.
while (HAL_tickCount - start < delay) {
// enter sleep mode, waiting for (at least) the SysTick interrupt.
__WFI();
}
#endif
MP_THREAD_GIL_ENTER();
} else {
for (int ms = 0; ms < delay; ms++) {
UtilsDelay(UTILS_DELAY_US_TO_COUNT(1000));
}
}
}
void mp_hal_set_interrupt_char (int c) {
mpexception_set_interrupt_char (c);
}
void mp_hal_stdout_tx_str(const char *str) {
mp_hal_stdout_tx_strn(str, strlen(str));
}
void mp_hal_stdout_tx_strn(const char *str, size_t len) {
if (MP_STATE_PORT(os_term_dup_obj)) {
if (MP_OBJ_IS_TYPE(MP_STATE_PORT(os_term_dup_obj)->stream_o, &pyb_uart_type)) {
uart_tx_strn(MP_STATE_PORT(os_term_dup_obj)->stream_o, str, len);
} else {
MP_STATE_PORT(os_term_dup_obj)->write[2] = mp_obj_new_str_of_type(&mp_type_str, (const byte *)str, len);
mp_call_method_n_kw(1, 0, MP_STATE_PORT(os_term_dup_obj)->write);
}
}
// and also to telnet
telnet_tx_strn(str, len);
}
void mp_hal_stdout_tx_strn_cooked (const char *str, size_t len) {
int32_t nslen = 0;
const char *_str = str;
for (int i = 0; i < len; i++) {
if (str[i] == '\n') {
mp_hal_stdout_tx_strn(_str, nslen);
mp_hal_stdout_tx_strn("\r\n", 2);
_str += nslen + 1;
nslen = 0;
} else {
nslen++;
}
}
if (_str < str + len) {
mp_hal_stdout_tx_strn(_str, nslen);
}
}
int mp_hal_stdin_rx_chr(void) {
for ( ;; ) {
// read telnet first
if (telnet_rx_any()) {
return telnet_rx_char();
} else if (MP_STATE_PORT(os_term_dup_obj)) { // then the stdio_dup
if (MP_OBJ_IS_TYPE(MP_STATE_PORT(os_term_dup_obj)->stream_o, &pyb_uart_type)) {
if (uart_rx_any(MP_STATE_PORT(os_term_dup_obj)->stream_o)) {
return uart_rx_char(MP_STATE_PORT(os_term_dup_obj)->stream_o);
}
} else {
MP_STATE_PORT(os_term_dup_obj)->read[2] = mp_obj_new_int(1);
mp_obj_t data = mp_call_method_n_kw(1, 0, MP_STATE_PORT(os_term_dup_obj)->read);
// data len is > 0
if (mp_obj_is_true(data)) {
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
return ((int *)(bufinfo.buf))[0];
}
}
}
mp_hal_delay_ms(1);
}
}
/******************************************************************************
DEFINE PRIVATE FUNCTIONS
******************************************************************************/
#ifndef USE_FREERTOS
static void hal_TickInit (void) {
HAL_tickCount = 0;
MAP_SysTickIntRegister(HAL_IncrementTick);
MAP_IntEnable(FAULT_SYSTICK);
MAP_SysTickIntEnable();
MAP_SysTickPeriodSet(HAL_FCPU_HZ / HAL_SYSTICK_PERIOD_US);
// Force a reload of the SysTick counter register
HWREG(NVIC_ST_CURRENT) = 0;
MAP_SysTickEnable();
}
#endif