| /* |
| * Copyright (c) 2017, 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. |
| */ |
| |
| #include <stddef.h> |
| |
| #include <driverlib/uart.h> |
| #include <driverlib/prcm.h> |
| #include <driverlib/ioc.h> |
| #include <driverlib/sys_ctrl.h> |
| |
| #include <openthread/types.h> |
| #include <utils/code_utils.h> |
| #include <openthread/platform/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 |
| * |
| * \note make sure that data being sent is not in a volatile area |
| */ |
| |
| enum |
| { |
| CC2650_RECV_CIRC_BUFF_SIZE = 256, |
| }; |
| |
| static uint8_t const *sSendBuffer = NULL; |
| static uint16_t sSendLen = 0; |
| |
| static uint8_t sReceiveBuffer[CC2650_RECV_CIRC_BUFF_SIZE]; |
| static uint16_t sReceiveHeadIdx = 0; |
| static uint16_t sReceiveTailIdx = 0; |
| |
| void UART0_intHandler(void); |
| |
| /** |
| * Function documented in platform/uart.h |
| */ |
| otError otPlatUartEnable(void) |
| { |
| PRCMPowerDomainOn(PRCM_DOMAIN_SERIAL); |
| |
| while (PRCMPowerDomainStatus(PRCM_DOMAIN_SERIAL) != PRCM_DOMAIN_POWER_ON); |
| |
| PRCMPeripheralRunEnable(PRCM_PERIPH_UART0); |
| PRCMPeripheralSleepEnable(PRCM_PERIPH_UART0); |
| PRCMPeripheralDeepSleepEnable(PRCM_PERIPH_UART0); |
| PRCMLoadSet(); |
| |
| while (!PRCMLoadGet()); |
| |
| IOCPinTypeUart(UART0_BASE, IOID_2, IOID_3, IOID_UNUSED, IOID_UNUSED); |
| |
| UARTConfigSetExpClk(UART0_BASE, SysCtrlClockGet(), 115200, |
| UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE); |
| 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); |
| |
| PRCMPeripheralRunDisable(PRCM_PERIPH_UART0); |
| PRCMPeripheralSleepDisable(PRCM_PERIPH_UART0); |
| PRCMPeripheralDeepSleepDisable(PRCM_PERIPH_UART0); |
| PRCMLoadSet(); |
| /** |
| * \warn this assumes that there are no other devices being used in the |
| * serial power domain |
| */ |
| PRCMPowerDomainOff(PRCM_DOMAIN_SERIAL); |
| 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 = CC2650_RECV_CIRC_BUFF_SIZE; |
| otPlatUartReceived(&(sReceiveBuffer[sReceiveHeadIdx]), tailIdx - sReceiveHeadIdx); |
| sReceiveHeadIdx = 0; |
| } |
| } |
| } |
| |
| /** |
| * @brief process the transmit side of the buffers |
| */ |
| static void processTransmit(void) |
| { |
| otEXPECT(sSendBuffer != NULL); |
| |
| for (; sSendLen > 0; sSendLen--) |
| { |
| UARTCharPut(UART0_BASE, *sSendBuffer); |
| sSendBuffer++; |
| } |
| |
| sSendBuffer = NULL; |
| sSendLen = 0; |
| otPlatUartSendDone(); |
| |
| exit: |
| return; |
| } |
| |
| /** |
| * Function documented in platform-cc2650.h |
| */ |
| void cc2650UartProcess(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 >= CC2650_RECV_CIRC_BUFF_SIZE) |
| { |
| sReceiveTailIdx = 0; |
| } |
| } |
| } |
| |