diff options
Diffstat (limited to 'os/hal/platforms/LPC43xx/dac_lld.c')
| -rw-r--r-- | os/hal/platforms/LPC43xx/dac_lld.c | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/os/hal/platforms/LPC43xx/dac_lld.c b/os/hal/platforms/LPC43xx/dac_lld.c deleted file mode 100644 index cff431fdf..000000000 --- a/os/hal/platforms/LPC43xx/dac_lld.c +++ /dev/null @@ -1,212 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
- LPC43xx DAC driver - Copyright (C) 2013 Marcin Jokel
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file LPC43xx/dac_lld.c
- * @brief LPC43xx DAC subsystem low level driver source.
- *
- * @addtogroup DAC
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_DAC || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/** @brief CHN1 driver identifier.*/
-DACDriver DACD1;
-
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-
-static lpc_dma_lli_config_t lpc_dac_lli[2] __attribute__((aligned(0x10)));
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-
-/**
- * @brief Shared end/half-of-tx service routine.
- *
- * @param[in] dacp pointer to the @p DACDriver object
- * @param[in] flags pre-shifted content of the ISR register
- */
-static void dac_serve_dma_interrupt(DACDriver *dacp, uint32_t flags) {
-
- if ((flags & (1 << LPC_DAC_DMA_CHANNEL)) != 0) {
- _dac_isr_error_code(dacp, flags); /* DMA errors handling.*/
- }
- else {
- if (dacp->half_buffer == false) {
- _dac_isr_half_code(dacp);
- dacp->half_buffer = true;
- }
- else {
- _dac_isr_full_code(dacp);
- dacp->half_buffer = false;
- }
- }
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level DAC driver initialization.
- *
- * @notapi
- */
-void dac_lld_init(void) {
- dacObjectInit(&DACD1);
-}
-
-/**
- * @brief Configures and activates the DAC peripheral.
- *
- * @param[in] dacp pointer to the @p DACDriver object
- *
- * @notapi
- */
-void dac_lld_start(DACDriver *dacp) {
-
- if (dacp->state == DAC_STOP) {
-
- LPC_CCU1->CLK_APB3_DAC_CFG = 1; /* Enable clock. */
- LPC_DAC->CR = 0;
- LPC_DAC->CTRL = 0;
- LPC_DAC->CNTVAL = LPC_BASE_APB3_CLK/dacp->config->frequency;
-
- dmaMuxSet(PERIPHERAL15, 0);
- dmaChannelAllocate(LPC_DAC_DMA_CHANNEL, \
- (lpc_dmaisr_t)dac_serve_dma_interrupt, \
- (void *)dacp);
-
- }
-}
-
-/**
- * @brief Deactivates the DAC peripheral.
- *
- * @param[in] dacp pointer to the @p DACDriver object
- *
- * @notapi
- */
-void dac_lld_stop(DACDriver *dacp) {
-
- /* If in ready state then disables the DAC clock.*/
- if (dacp->state == DAC_READY) {
-
- /* DMA disable.*/
- dmaChannelDisable(LPC_DAC_DMA_CHANNEL);
- dmaChannelRelease(LPC_DAC_DMA_CHANNEL);
-
- LPC_DAC->CTRL = 0; /* Disable DAC */
- LPC_CCU1->CLK_APB3_DAC_CFG = 0; /* Disable clock. */
- }
-}
-
-/**
- * @brief Sends data over the DAC bus.
- * @details This asynchronous function starts a transmit operation.
- * @post At the end of the operation the configured callback is invoked.
- *
- * @param[in] dacp pointer to the @p DACDriver object
- * @param[in] n number of words to send
- * @param[in] txbuf the pointer to the transmit buffer
- *
- * @notapi
- */
-void dac_lld_start_conversion(DACDriver *dacp) {
-
- dacp->half_buffer = false;
- uint32_t dma_ch_config;
-
- /* DMA configuration */
- lpc_dac_lli[0].srcaddr = (uint32_t) &dacp->samples[0];
- lpc_dac_lli[0].dstaddr = (uint32_t)&LPC_DAC->CR;
- lpc_dac_lli[0].lli = (uint32_t) &lpc_dac_lli[1];
- lpc_dac_lli[0].control =
- DMA_CTRL_TRANSFER_SIZE(dacp->depth/2) |
- DMA_CTRL_SRC_BSIZE_1 |
- DMA_CTRL_DST_BSIZE_1 |
- DMA_CTRL_SRC_WIDTH_WORD |
- DMA_CTRL_DST_WIDTH_WORD |
- DMA_CTRL_SRC_AHBM0 |
- DMA_CTRL_DST_AHBM1 |
- DMA_CTRL_SRC_INC |
- DMA_CTRL_DST_NOINC |
- DMA_CTRL_PROT1_USER |
- DMA_CTRL_PROT2_NONBUFF |
- DMA_CTRL_PROT3_NONCACHE |
- DMA_CTRL_INT;
-
- lpc_dac_lli[1].srcaddr = (uint32_t) &dacp->samples[dacp->depth/2];
- lpc_dac_lli[1].dstaddr = lpc_dac_lli[0].dstaddr;
- lpc_dac_lli[1].control = lpc_dac_lli[0].control;
-
- if (dacp->grpp->circular == true) {
- lpc_dac_lli[1].lli = (uint32_t) &lpc_dac_lli[0];
- }
- else {
- lpc_dac_lli[1].lli = 0;
- }
-
- dma_ch_config =
- DMA_CFG_CH_ENABLE |
- DMA_CFG_DST_PERIPH(PERIPHERAL15) |
- DMA_CFG_FCTRL_M2P |
- DMA_CFG_IE |
- DMA_CFG_ITC;
-
- dmaChannelSrcAddr(LPC_DAC_DMA_CHANNEL, lpc_dac_lli[0].srcaddr);
- dmaChannelDstAddr(LPC_DAC_DMA_CHANNEL, lpc_dac_lli[0].dstaddr);
- dmaChannelLinkedList(LPC_DAC_DMA_CHANNEL, lpc_dac_lli[0].lli, DMA_LLI_AHBM0);
- dmaChannelControl(LPC_DAC_DMA_CHANNEL, lpc_dac_lli[0].control);
- dmaChannelConfig(LPC_DAC_DMA_CHANNEL, dma_ch_config);
-
- LPC_DAC->CTRL = DACCTRL_DMA_ENA | DACCTRL_CNT_ENA | DACCTRL_DBLBUF_ENA;
-}
-
-void dac_lld_stop_conversion(DACDriver *dacp) {
-
- /* If in active state then disables the DAC.*/
- if (dacp->state == DAC_ACTIVE) {
-
- /* DMA disable.*/
- dmaChannelDisable(LPC_DAC_DMA_CHANNEL);
- }
-};
-
-#endif /* HAL_USE_DAC */
-
-/** @} */
|