mirror of https://github.com/efabless/caravel.git
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2020 Efabless Corporation
|
|
*
|
|
* 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.
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <defs.h>
|
|
|
|
/*
|
|
Testing timer interrupts
|
|
Enable interrupt for timer0 and configure it as countdown 1 shot
|
|
wait for interrupt
|
|
|
|
*/
|
|
|
|
|
|
void main(){
|
|
uint32_t value;
|
|
uint32_t old_value;
|
|
reg_wb_enable =1; // for enable writing to reg_debug_1 and reg_debug_2
|
|
reg_debug_1 = 0x0;
|
|
reg_debug_2 = 0x0;
|
|
/* Configure timer for a single-shot countdown */
|
|
reg_timer0_config = 0; // disable
|
|
reg_timer0_data = 0;
|
|
reg_timer0_data_periodic = 0x300;
|
|
reg_timer0_config = 1; // enable
|
|
|
|
// Loop, waiting for the interrupt to change reg_mprj_datah
|
|
// test path if counter value stop updated after reach 0 and also the value is always decrementing
|
|
reg_timer0_update = 1; // update reg_timer0_value with new counter value
|
|
old_value = reg_timer0_value;
|
|
// value us decrementing until it reachs zero
|
|
int rollover = 0;
|
|
int timeout = 400;
|
|
for (int i = 0; i < timeout; i++){
|
|
reg_timer0_update = 1; // update reg_timer0_value with new counter value
|
|
value = reg_timer0_value;
|
|
if (value > old_value){
|
|
rollover++;
|
|
if (rollover==1)
|
|
reg_debug_1 = 0x1B; // timer rollover
|
|
else if (rollover==2)
|
|
reg_debug_1 = 0x2B; //timer rollover second time
|
|
else if (rollover==3){
|
|
reg_debug_1 = 0x3B; //timer rollover second time
|
|
break;
|
|
}
|
|
}
|
|
if (value < old_value){
|
|
reg_debug_1 = 0x4B; // value decreases
|
|
}
|
|
old_value = value;
|
|
}
|
|
|
|
if (rollover ==0){
|
|
reg_debug_1 = 0xEE; // counter didn't rollover
|
|
}
|
|
reg_debug_2 = 0xFF; // finish test
|
|
|
|
}
|
|
|