| /* |
| * Copyright (c) 2018, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** |
| * @file |
| * This file implements the OpenThread platform abstraction for UART communication. |
| * |
| */ |
| |
| #include <openthread-core-config.h> |
| #include <openthread/config.h> |
| |
| #include <stdarg.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| |
| #include <openthread/platform/debug_uart.h> |
| #include <openthread/platform/logging.h> |
| #include <openthread/platform/uart.h> |
| |
| #include "utils/code_utils.h" |
| |
| #include <utils/code_utils.h> |
| |
| #include <driverlib/ioc.h> |
| #include <driverlib/prcm.h> |
| #include <driverlib/sys_ctrl.h> |
| #include <driverlib/uart.h> |
| |
| /** |
| * @note This will configure the uart for 115200 baud 8-N-1, no HW flow control |
| * RX pin IOID_2 TX pin IOID_3. |
| * |
| * If the DEBUG UART is enabled, IOID_0 = debug tx, IOID_1 = debug rx |
| */ |
| |
| enum |
| { |
| CC1352_RECV_CIRC_BUFF_SIZE = 256, |
| }; |
| |
| static uint8_t const *sSendBuffer = NULL; |
| static uint16_t sSendLen = 0; |
| |
| static uint8_t sReceiveBuffer[CC1352_RECV_CIRC_BUFF_SIZE]; |
| static uint16_t sReceiveHeadIdx = 0; |
| static uint16_t sReceiveTailIdx = 0; |
| |
| void UART0_intHandler(void); |
| |
| static void uart_power_control(uint32_t who_base, int turnon) |
| { |
| uint32_t value; |
| |
| if (turnon) |
| { |
| /* UART0 is in the SERIAL domain |
| * UART1 is in the PERIPH domain. |
| * See: ti/devices/cc13x2_cc26x2/driverlib/pcrm.h, line: 658 |
| */ |
| value = (who_base == UART0_BASE) ? PRCM_DOMAIN_SERIAL : PRCM_DOMAIN_PERIPH; |
| PRCMPowerDomainOn(value); |
| |
| while (PRCMPowerDomainStatus(value) != PRCM_DOMAIN_POWER_ON) |
| ; |
| |
| value = (who_base == UART0_BASE) ? PRCM_PERIPH_UART0 : PRCM_PERIPH_UART1; |
| PRCMPeripheralRunEnable(value); |
| PRCMPeripheralSleepEnable(value); |
| PRCMPeripheralDeepSleepEnable(value); |
| PRCMLoadSet(); |
| |
| while (!PRCMLoadGet()) |
| ; |
| } |
| else |
| { |
| if (who_base == UART0_BASE) |
| { |
| PRCMPeripheralRunDisable(PRCM_PERIPH_UART0); |
| PRCMPeripheralSleepDisable(PRCM_PERIPH_UART0); |
| PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_UART0); |
| PRCMLoadSet(); |
| PRCMPowerDomainOff(PRCM_DOMAIN_SERIAL); |
| } |
| else |
| { |
| /* we never turn the debug uart off */ |
| } |
| } |
| } |
| |
| /** |
| * Function documented in platform/uart.h |
| */ |
| otError otPlatUartEnable(void) |
| { |
| uart_power_control(UART0_BASE, true); |
| |
| IOCPinTypeUart(UART0_BASE, IOID_12, IOID_13, IOID_UNUSED, IOID_UNUSED); |
| UARTConfigSetExpClk(UART0_BASE, SysCtrlClockGet(), 115200, |
| UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE); |
| |
| /* Note: UART1 could use IRQs |
| * However, for reasons of debug simplicity |
| * we do not use IRQs for the debug uart |
| */ |
| UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT); |
| UARTIntRegister(UART0_BASE, UART0_intHandler); |
| UARTEnable(UART0_BASE); |
| |
| return OT_ERROR_NONE; |
| } |
| |
| /** |
| * Function documented in platform/uart.h |
| */ |
| otError otPlatUartDisable(void) |
| { |
| UARTDisable(UART0_BASE); |
| UARTIntUnregister(UART0_BASE); |
| UARTIntDisable(UART0_BASE, UART_INT_RX | UART_INT_RT); |
| IOCPortConfigureSet(IOID_2, IOC_PORT_GPIO, IOC_STD_INPUT); |
| IOCPortConfigureSet(IOID_3, IOC_PORT_GPIO, IOC_STD_INPUT); |
| |
| uart_power_control(UART0_BASE, false); |
| |
| return OT_ERROR_NONE; |
| } |
| |
| /** |
| * Function documented in platform/uart.h |
| */ |
| otError otPlatUartSend(const uint8_t *aBuf, uint16_t aBufLength) |
| { |
| otError error = OT_ERROR_NONE; |
| otEXPECT_ACTION(sSendBuffer == NULL, error = OT_ERROR_BUSY); |
| |
| sSendBuffer = aBuf; |
| sSendLen = aBufLength; |
| |
| exit: |
| return error; |
| } |
| |
| /** |
| * @brief process the receive side of the buffers |
| */ |
| static void processReceive(void) |
| { |
| while (sReceiveHeadIdx != sReceiveTailIdx) |
| { |
| uint16_t tailIdx; |
| |
| if (sReceiveHeadIdx < sReceiveTailIdx) |
| { |
| tailIdx = sReceiveTailIdx; |
| otPlatUartReceived(&(sReceiveBuffer[sReceiveHeadIdx]), tailIdx - sReceiveHeadIdx); |
| sReceiveHeadIdx = tailIdx; |
| } |
| else |
| { |
| tailIdx = CC1352_RECV_CIRC_BUFF_SIZE; |
| otPlatUartReceived(&(sReceiveBuffer[sReceiveHeadIdx]), tailIdx - sReceiveHeadIdx); |
| sReceiveHeadIdx = 0; |
| } |
| } |
| } |
| |
| otError otPlatUartFlush(void) |
| { |
| otEXPECT(sSendBuffer != NULL); |
| |
| for (; sSendLen > 0; sSendLen--) |
| { |
| UARTCharPut(UART0_BASE, *sSendBuffer); |
| sSendBuffer++; |
| } |
| |
| sSendBuffer = NULL; |
| sSendLen = 0; |
| |
| return OT_ERROR_NONE; |
| |
| exit: |
| return OT_ERROR_INVALID_STATE; |
| } |
| |
| /** |
| * @brief process the transmit side of the buffers |
| */ |
| static void processTransmit(void) |
| { |
| otPlatUartFlush(); |
| otPlatUartSendDone(); |
| } |
| |
| /** |
| * Function documented in platform-cc1352.h |
| */ |
| void cc1352UartProcess(void) |
| { |
| processReceive(); |
| processTransmit(); |
| } |
| |
| /** |
| * @brief the interrupt handler for the uart interrupt vector |
| */ |
| void UART0_intHandler(void) |
| { |
| while (UARTCharsAvail(UART0_BASE)) |
| { |
| uint32_t c = UARTCharGet(UART0_BASE); |
| /* XXX process error flags for this character ?? */ |
| sReceiveBuffer[sReceiveTailIdx] = (uint8_t)c; |
| sReceiveTailIdx++; |
| |
| if (sReceiveTailIdx >= CC1352_RECV_CIRC_BUFF_SIZE) |
| { |
| sReceiveTailIdx = 0; |
| } |
| } |
| } |
| |
| #if OPENTHREAD_CONFIG_ENABLE_DEBUG_UART |
| |
| /* |
| * Documented in platform-cc1352.h |
| */ |
| void cc1352DebugUartInit(void) |
| { |
| uart_power_control(UART1_BASE, true); |
| /* |
| * LaunchPad Pin29 = tx, Pin 30 = rxd |
| * |
| * The function IOCPinTypeUart() is hard coded to |
| * only support UART0 - and does not support UART1. |
| * |
| * Thus, these pins are configured using a different way. |
| */ |
| IOCPortConfigureSet(IOID_0, IOC_PORT_MCU_UART1_TX, IOC_STD_INPUT); |
| IOCPortConfigureSet(IOID_1, IOC_PORT_MCU_UART1_RX, IOC_STD_INPUT); |
| |
| UARTConfigSetExpClk(UART1_BASE, SysCtrlClockGet(), 115200, |
| UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE); |
| UARTEnable(UART1_BASE); |
| } |
| |
| /* This holds the last key pressed */ |
| static int debug_uart_ungetbuf; |
| |
| /* |
| * Documented in "src/core/common/debug_uart.h" |
| */ |
| int otPlatDebugUart_getc(void) |
| { |
| int ch = -1; |
| |
| if (otPlatDebugUart_kbhit()) |
| { |
| /* get & clear 0x100 bit used below as flag */ |
| ch = debug_uart_ungetbuf & 0x0ff; |
| debug_uart_ungetbuf = 0; |
| } |
| |
| return ch; |
| } |
| |
| /* |
| * Documented in "src/core/common/debug_uart.h" |
| */ |
| int otPlatDebugUart_kbhit(void) |
| { |
| int r; |
| |
| /* if something is in the unget buf... */ |
| r = !!debug_uart_ungetbuf; |
| |
| if (!r) |
| { |
| /* |
| * Driverlib code returns "-1", or "char" on something |
| * but it comes with flags in upper bits |
| */ |
| r = (int)UARTCharGetNonBlocking(UART1_BASE); |
| |
| if (r < 0) |
| { |
| r = 0; /* no key pressed */ |
| } |
| else |
| { |
| /* key was pressed, mask flags |
| * and set 0x100 bit, to distinguish |
| * the value "0x00" from "no-key-pressed" |
| */ |
| debug_uart_ungetbuf = ((r & 0x0ff) | 0x0100); |
| |
| r = 1; /* key pressed */ |
| } |
| } |
| |
| return r; |
| } |
| |
| /* |
| * Documented in "src/core/common/debug_uart.h" |
| */ |
| void otPlatDebugUart_putchar_raw(int b) |
| { |
| UARTCharPut(UART1_BASE, b); |
| } |
| |
| #endif /* OPENTHREAD_CONFIG_ENABLE_DEBUG_UART */ |