- /****************************************************************************
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V0.10
- * [url=home.php?mod=space&uid=247401]@brief[/url] Demonstrate how to PDMA and trigger DAC by Timer.
- *
- * SPDX-License-Identifier: Apache-2.0
- * Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include "stdio.h"
- #include "NuMicro.h"
- #if defined (__GNUC__) && !defined(__ARMCC_VERSION) && defined(OS_USE_SEMIHOSTING)
- extern void initialise_monitor_handles(void);
- #endif
- const uint16_t g_au16Sine[] = {2047, 2251, 2453, 2651, 2844, 3028, 3202, 3365, 3515, 3650, 3769, 3871, 3954,
- 4019, 4064, 4088, 4095, 4076, 4040, 3984, 3908, 3813, 3701, 3573, 3429, 3272,
- 3102, 2921, 2732, 2536, 2335, 2132, 1927, 1724, 1523, 1328, 1141, 962, 794,
- 639, 497, 371, 262, 171, 99, 45, 12, 0, 7, 35, 84, 151,
- 238, 343, 465, 602, 754, 919, 1095, 1281, 1475, 1674, 1876
- };
- const uint32_t g_u32ArraySize = sizeof(g_au16Sine) / sizeof(uint16_t);
- void SYS_Init(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
- /* Enable HIRC clock */
- CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
- /* Waiting for HIRC clock ready */
- CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
- /* Select HCLK clock source as HIRC and and HCLK clock divider as 1 */
- CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
- /* Enable UART module clock */
- CLK_EnableModuleClock(UART0_MODULE);
- /* Select UART module clock source as HIRC and UART module clock divider as 1 */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));
- /* Enable DAC module clock */
- CLK_EnableModuleClock(DAC01_MODULE);
- /* Enable Timer 0 module clock */
- CLK_EnableModuleClock(TMR0_MODULE);
- /* Enable PDMA module clock */
- CLK_EnableModuleClock(PDMA_MODULE);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set PB multi-function pins for UART0 RXD=PB.12 and TXD=PB.13 */
- SYS->GPB_MFPH = (SYS->GPB_MFPH & ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk)) |
- (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);
- /* Set PA multi-function pins for DAC voltage output */
- SYS->GPA_MFPL = (SYS->GPA_MFPL & ~SYS_GPA_MFPL_PA0MFP_Msk) | SYS_GPA_MFPL_PA0MFP_DAC0_OUT;
- /* Set PA.0 to input mode */
- PA->MODE &= ~(GPIO_MODE_MODE0_Msk) ;
- /* Disable digital input path of analog pin DAC01_OUT to prevent leakage */
- GPIO_DISABLE_DIGITAL_PATH(PA, (1ul << 0));
- /* Lock protected registers */
- SYS_LockReg();
- }
- int32_t main(void)
- {
- /* Init System, IP clock and multi-function I/O */
- SYS_Init();
- #if defined (__GNUC__) && !defined(__ARMCC_VERSION) && defined(OS_USE_SEMIHOSTING)
- initialise_monitor_handles();
- #endif
- /* Configure UART0 and set UART0 baud rate */
- UART_Open(UART0, 115200);
- printf("+----------------------------------------------------------+\n");
- printf("| DAC Driver Sample Code |\n");
- printf("+----------------------------------------------------------+\n");
- printf("This sample code use PDMA and trigger DAC output sine wave by Timer 0.\n");
- /* Open Channel 0 */
- PDMA_Open(PDMA, 0x1);
- /* Set transfer data width, and transfer count */
- PDMA_SetTransferCnt(PDMA, 0, PDMA_WIDTH_16, g_u32ArraySize);
- /* transfer width is one word(32 bit) */
- PDMA_SetTransferAddr(PDMA, 0, (uint32_t)&g_au16Sine[0], PDMA_SAR_INC, (uint32_t)&DAC0->DAT, PDMA_DAR_FIX);
- /* Select channel 0 request source from DAC */
- PDMA_SetTransferMode(PDMA, 0, PDMA_DAC0_TX, FALSE, 0);
- /* Set transfer type and burst size */
- PDMA_SetBurstType(PDMA, 0, PDMA_REQ_SINGLE, PDMA_BURST_128);
- /* Set the timer 0 trigger DAC and enable D/A converter */
- DAC_Open(DAC0, 0, DAC_TIMER0_TRIGGER);
- /* The DAC conversion settling time is 1us */
- DAC_SetDelayTime(DAC0, 1);
- /* Clear the DAC conversion complete finish flag for safe */
- DAC_CLR_INT_FLAG(DAC0, 0);
- /* Enable the PDMA Mode */
- DAC_ENABLE_PDMA(DAC0);
- /* Enable Timer0 counting to start D/A conversion */
- TIMER_Open(TIMER0, TIMER_PERIODIC_MODE, 1000);
- TIMER_SetTriggerTarget(TIMER0, TIMER_TRG_TO_DAC);
- TIMER_Start(TIMER0);
- while (1)
- {
- if (PDMA_GET_TD_STS(PDMA) == 0x1)
- {
- /* Re-Set transfer count and basic operation mode */
- PDMA_SetTransferCnt(PDMA, 0, PDMA_WIDTH_16, g_u32ArraySize);
- PDMA_SetTransferMode(PDMA, 0, PDMA_DAC0_TX, FALSE, 0);
- /* Clear PDMA channel 0 transfer done flag */
- PDMA_CLR_TD_FLAG(PDMA, 0x1);
- }
- }
- }
- /*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/
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