mbed library sources. Supersedes mbed-src.
Dependents: Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more
Diff: targets/TARGET_TOSHIBA/TARGET_TMPM066/us_ticker.c
- Revision:
- 188:bcfe06ba3d64
- Parent:
- 172:7d866c31b3c5
--- a/targets/TARGET_TOSHIBA/TARGET_TMPM066/us_ticker.c Thu Sep 06 13:40:20 2018 +0100 +++ b/targets/TARGET_TOSHIBA/TARGET_TMPM066/us_ticker.c Thu Nov 08 11:46:34 2018 +0000 @@ -1,5 +1,5 @@ /* mbed Microcontroller Library - * (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2017 All rights reserved + * (C)Copyright TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION 2018 All rights reserved * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -13,51 +13,57 @@ * See the License for the specific language governing permissions and * limitations under the License. */ +#include <stdbool.h> #include "us_ticker_api.h" -#include "mbed_critical.h" - -#define TMR16A_100US 0x960 // fsys = fc = 24MHz, Ttmra = 1/24us, 100us*24us = 2400 = 0x960 -#define TMR16A_SYSCK ((uint32_t)0x00000001) -#define TMR16A_RUN ((uint32_t)0x00000001) -#define TMR16A_STOP ((uint32_t)0x00000000) -#define OVERFLOW_32BIT (0xFFFFFFFF / 0x64) +#include "tmpm066_tmrb.h" +#include "tmpm066_intifsd.h" -static uint8_t us_ticker_inited = 0; // Is ticker initialized yet? -static volatile uint32_t ticker_int_counter = 0; // Amount of overflows until user interrupt -static volatile uint32_t us_ticker = 0; // timer counter +#define MAX_TICK_16_BIT 0xFFFF -void INT16A0_IRQHandler(void) +static bool us_ticker_inited = false; // Is ticker initialized yet? + +void INTTB7_IRQHandler(void) { - us_ticker++; - - if (us_ticker > OVERFLOW_32BIT) { - us_ticker = 0; - } + us_ticker_irq_handler(); } -void INT16A1_IRQHandler(void) +const ticker_info_t* us_ticker_get_info() { - us_ticker_irq_handler(); + static const ticker_info_t info = { + 3000000, // 3MHz, + 16 // 16 bit counter + }; + return &info; } // initialize us_ticker void us_ticker_init(void) { - // Enable clock supply to TA0 - CG_SetFcPeriphA(CG_FC_PERIPH_TMR16A, ENABLE); + TMRB_InitTypeDef m_tmrb0; + if (us_ticker_inited) { + us_ticker_disable_interrupt(); return; } - us_ticker_inited = 1; + us_ticker_inited = true; + // TSB_TB7 using free-run + m_tmrb0.Mode = TMRB_INTERVAL_TIMER; + m_tmrb0.ClkDiv = TMRB_CLK_DIV_8; + m_tmrb0.UpCntCtrl = TMRB_FREE_RUN; + m_tmrb0.TrailingTiming = MAX_TICK_16_BIT; + m_tmrb0.LeadingTiming = MAX_TICK_16_BIT; + + // Enable channel 0 + TMRB_Enable(TSB_TB7); // Stops and clear count operation - TSB_T16A0->RUN = TMR16A_STOP; - TSB_T16A0->CR = TMR16A_SYSCK; - // Permits INTTA0 interrupt - NVIC_EnableIRQ(INT16A0_IRQn); - // Match counter set to max value - TSB_T16A0->RG = TMR16A_100US; - TSB_T16A0->RUN = TMR16A_RUN; + TMRB_SetRunState(TSB_TB7, TMRB_STOP); + // Mask All interrupts + TMRB_SetINTMask(TSB_TB7, TMRB_MASK_MATCH_LEADINGTIMING_INT | TMRB_MASK_MATCH_TRAILINGTIMING_INT | TMRB_MASK_OVERFLOW_INT); + // Initialize timer + TMRB_Init(TSB_TB7, &m_tmrb0); + // Starts TSB_TB7 + TMRB_SetRunState(TSB_TB7, TMRB_RUN); } uint32_t us_ticker_read(void) @@ -68,42 +74,47 @@ us_ticker_init(); } - uint32_t tickerbefore = 0; - do { - tickerbefore = us_ticker; - ret_val = (us_ticker * 100); - } while (tickerbefore != us_ticker); + ret_val = (uint32_t)TMRB_GetUpCntValue(TSB_TB7); return ret_val; } void us_ticker_set_interrupt(timestamp_t timestamp) { - uint32_t delta = 0; - - // Stops and clear count operation - TSB_T16A1->RUN = TMR16A_STOP; - TSB_T16A1->CR = TMR16A_SYSCK; - // Set the compare register - delta = (timestamp - us_ticker_read()); - TSB_T16A1->RG = delta; - // Set Interrupt - NVIC_EnableIRQ(INT16A1_IRQn); - // Start TMR_TA1 timer - TSB_T16A1->RUN = TMR16A_RUN; + NVIC_DisableIRQ(INTTB7_IRQn); + NVIC_ClearPendingIRQ(INTTB7_IRQn); + TMRB_ChangeTrailingTiming(TSB_TB7, timestamp); + //Mask all Interrupts except trailing edge interrupt + TMRB_SetINTMask(TSB_TB7, TMRB_MASK_MATCH_LEADINGTIMING_INT | TMRB_MASK_OVERFLOW_INT); + NVIC_EnableIRQ(INTTB7_IRQn); } void us_ticker_fire_interrupt(void) { - NVIC_SetPendingIRQ(INT16A1_IRQn); + NVIC_SetPendingIRQ(INTTB7_IRQn); + NVIC_EnableIRQ(INTTB7_IRQn); } void us_ticker_disable_interrupt(void) { - NVIC_DisableIRQ(INT16A1_IRQn); + // Mask All interrupts + TMRB_SetINTMask(TSB_TB7, TMRB_MASK_MATCH_LEADINGTIMING_INT | TMRB_MASK_MATCH_TRAILINGTIMING_INT | TMRB_MASK_OVERFLOW_INT); + // Also clear and disable interrupts by NVIC + NVIC_ClearPendingIRQ(INTTB7_IRQn); + NVIC_DisableIRQ(INTTB7_IRQn); } void us_ticker_clear_interrupt(void) { - //no flags to clear + INTIFSD_ClearINTReq(INTIFSD_INT_SRC_TMRB_7_MDOVF); + NVIC_ClearPendingIRQ(INTTB7_IRQn); } + +void us_ticker_free(void) +{ + TMRB_SetINTMask(TSB_TB7, TMRB_MASK_MATCH_LEADINGTIMING_INT | TMRB_MASK_MATCH_TRAILINGTIMING_INT | TMRB_MASK_OVERFLOW_INT); + NVIC_ClearPendingIRQ(INTTB7_IRQn); + NVIC_DisableIRQ(INTTB7_IRQn); + TMRB_SetRunState(TSB_TB7, TMRB_STOP); + TMRB_Disable(TSB_TB7); +}