Diff: targets/TARGET_NUVOTON/TARGET_M451/dma_api.c

Revision:

153:9398a535854b

Parent:

152:9a67f0b066fc

--- a/targets/TARGET_NUVOTON/TARGET_M451/dma_api.c	Thu Dec 15 11:48:27 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,178 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2015-2016 Nuvoton
- *
- * 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.
- */
-
-#include "dma_api.h"
-#include "string.h"
-#include "cmsis.h"
-#include "mbed_assert.h"
-#include "PeripheralNames.h"
-#include "nu_modutil.h"
-#include "nu_bitutil.h"
-#include "dma.h"
-
-struct nu_dma_chn_s {
-    void        (*handler)(uint32_t, uint32_t);
-    uint32_t    id;
-    uint32_t    event;
-};
-
-static int dma_inited = 0;
-static uint32_t dma_chn_mask = 0;
-static struct nu_dma_chn_s dma_chn_arr[PDMA_CH_MAX];
-
-static void pdma_vec(void);
-static const struct nu_modinit_s dma_modinit = {DMA_0, PDMA_MODULE, 0, 0, PDMA_RST, PDMA_IRQn, (void *) pdma_vec};
-
-
-void dma_init(void)
-{
-    if (dma_inited) {
-        return;
-    }
-    
-    dma_inited = 1;
-    dma_chn_mask = 0;
-    memset(dma_chn_arr, 0x00, sizeof (dma_chn_arr));
-    
-    // Reset this module
-    SYS_ResetModule(dma_modinit.rsetidx);
-    
-    // Enable IP clock
-    CLK_EnableModuleClock(dma_modinit.clkidx);
-    
-    PDMA_Open(0);
-    
-    NVIC_SetVector(dma_modinit.irq_n, (uint32_t) dma_modinit.var);
-    NVIC_EnableIRQ(dma_modinit.irq_n);
-}
-
-int dma_channel_allocate(uint32_t capabilities)
-{
-    if (! dma_inited) {
-        dma_init();
-    }
-    
-#if 1
-    int i = nu_cto(dma_chn_mask);
-    if (i != 32) {
-         dma_chn_mask |= 1 << i;
-         memset(dma_chn_arr + i, 0x00, sizeof (struct nu_dma_chn_s));
-         return i;
-    }
-#else
-    int i;
-    
-    for (i = 0; i < PDMA_CH_MAX; i ++) {
-        if ((dma_chn_mask & (1 << i)) == 0) {
-            // Channel available
-            dma_chn_mask |= 1 << i;
-            memset(dma_chn_arr + i, 0x00, sizeof (struct nu_dma_chn_s));
-            return i;
-        }
-    }
-#endif
-
-    // No channel available
-    return DMA_ERROR_OUT_OF_CHANNELS;
-}
-
-int dma_channel_free(int channelid)
-{
-    if (channelid != DMA_ERROR_OUT_OF_CHANNELS) {
-        dma_chn_mask &= ~(1 << channelid);
-    }
-    
-    return 0;
-}
-
-void dma_set_handler(int channelid, uint32_t handler, uint32_t id, uint32_t event)
-{
-    MBED_ASSERT(dma_chn_mask & (1 << channelid));
-    
-    dma_chn_arr[channelid].handler = (void (*)(uint32_t, uint32_t)) handler;
-    dma_chn_arr[channelid].id = id;
-    dma_chn_arr[channelid].event = event;
-    
-    // Set interrupt vector if someone has removed it.
-    NVIC_SetVector(dma_modinit.irq_n, (uint32_t) dma_modinit.var);
-    NVIC_EnableIRQ(dma_modinit.irq_n);
-}
-
-static void pdma_vec(void)
-{
-    uint32_t intsts = PDMA_GET_INT_STATUS();
-    
-    // Abort
-    if (intsts & PDMA_INTSTS_ABTIF_Msk) {
-        uint32_t abtsts = PDMA_GET_ABORT_STS();
-        // Clear all Abort flags
-        PDMA_CLR_ABORT_FLAG(abtsts);
-        
-        while (abtsts) {
-            int chn_id = nu_ctz(abtsts);
-            if (dma_chn_mask & (1 << chn_id)) {
-                struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
-                if (dma_chn->handler && (dma_chn->event & DMA_EVENT_ABORT)) {
-                    dma_chn->handler(dma_chn->id, DMA_EVENT_ABORT);
-                }
-            }
-            abtsts &= ~(1 << chn_id);
-        }
-    }
-    
-    // Transfer done
-    if (intsts & PDMA_INTSTS_TDIF_Msk) {
-        uint32_t tdsts = PDMA_GET_TD_STS();    
-        // Clear all transfer done flags
-        PDMA_CLR_TD_FLAG(tdsts);
-        
-        while (tdsts) {
-            int chn_id = nu_ctz(tdsts);
-            if (dma_chn_mask & (1 << chn_id)) {
-                struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
-                if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TRANSFER_DONE)) {
-                    dma_chn->handler(dma_chn->id, DMA_EVENT_TRANSFER_DONE);
-                }
-            }
-            tdsts &= ~(1 << chn_id);
-        }
-    }
-    
-    // Table empty
-    if (intsts & PDMA_INTSTS_TEIF_Msk) {
-        uint32_t scatsts = PDMA_GET_EMPTY_STS();    
-        // Clear all table empty flags
-        PDMA_CLR_EMPTY_FLAG(scatsts);
-    }
-    
-    // Timeout
-    uint32_t reqto = intsts & PDMA_INTSTS_REQTOFn_Msk;
-    if (reqto) {
-        // Clear all Timeout flags
-        PDMA->INTSTS = reqto;
-        
-        while (reqto) {
-            int chn_id = nu_ctz(reqto) >> PDMA_INTSTS_REQTOFn_Pos;
-            if (dma_chn_mask & (1 << chn_id)) {
-                struct nu_dma_chn_s *dma_chn = dma_chn_arr + chn_id;
-                if (dma_chn->handler && (dma_chn->event & DMA_EVENT_TIMEOUT)) {
-                    dma_chn->handler(dma_chn->id, DMA_EVENT_TIMEOUT);
-                }
-            }
-            reqto &= ~(1 << (chn_id + PDMA_INTSTS_REQTOFn_Pos));
-        }
-    }
-}