8f80cc733d
When two CPUs read the area of the DPORT and the area of the APB, the result is corrupted for the CPU that read the APB area. And another CPU has valid data. The method of eliminating this error. Before reading the registers of the DPORT, make a preliminary reading of the APB register. In this case, the joint access of the two CPUs to the registers of the APB and the DPORT is successful.
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
// Copyright 2010-2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <sdkconfig.h>
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#ifndef _ESP_DPORT_ACCESS_H_
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#define _ESP_DPORT_ACCESS_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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void esp_dport_access_stall_other_cpu_start(void);
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void esp_dport_access_stall_other_cpu_end(void);
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void esp_dport_access_int_init(void);
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void esp_dport_access_int_pause(void);
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void esp_dport_access_int_resume(void);
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void esp_dport_access_read_buffer(uint32_t *buff_out, uint32_t address, uint32_t num_words);
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//This routine does not stop the dport routines in any way that is recoverable. Please
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//only call in case of panic().
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void esp_dport_access_int_abort(void);
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#if defined(BOOTLOADER_BUILD) || defined(CONFIG_FREERTOS_UNICORE) || !defined(ESP_PLATFORM)
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#define DPORT_STALL_OTHER_CPU_START()
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#define DPORT_STALL_OTHER_CPU_END()
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#define DPORT_STALL_OTHER_CPU_START()
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#define DPORT_INTERRUPT_DISABLE()
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#define DPORT_INTERRUPT_RESTORE()
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#else
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#define DPORT_STALL_OTHER_CPU_START() esp_dport_access_stall_other_cpu_start()
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#define DPORT_STALL_OTHER_CPU_END() esp_dport_access_stall_other_cpu_end()
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#define DPORT_INTERRUPT_DISABLE() unsigned int intLvl = XTOS_SET_INTLEVEL(XCHAL_EXCM_LEVEL)
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#define DPORT_INTERRUPT_RESTORE() XTOS_RESTORE_JUST_INTLEVEL(intLvl)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ESP_DPORT_ACCESS_H_ */
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