begriffs open source - cmsis-freertos/blob - Demo/PIC32MZ

1 /*

2 * FreeRTOS Kernel V10.1.1

4 *

5 * Permission is hereby granted, free of charge, to any person obtaining a copy of

6 * this software and associated documentation files (the "Software"), to deal in

7 * the Software without restriction, including without limitation the rights to

8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of

9 * the Software, and to permit persons to whom the Software is furnished to do so,

10 * subject to the following conditions:

11 *

12 * The above copyright notice and this permission notice shall be included in all

13 * copies or substantial portions of the Software.

14 *

15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS

17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR

18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER

19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

21 *

22 * http://www.FreeRTOS.org

23 * http://aws.amazon.com/freertos

24 *

25 * 1 tab == 4 spaces!

26 */

28 /*

29 * This file implements functions to access and manipulate the PIC32 hardware

30 * without reliance on third party library functions that may be liable to

31 * change.

32 */

34 /* FreeRTOS includes. */

35 #include "FreeRTOS.h"

37 /* Demo includes. */

38 #include "ConfigPerformance.h"

40 #define hwUNLOCK_KEY_0 ( 0xAA996655UL )

41 #define hwUNLOCK_KEY_1 ( 0x556699AAUL )

43 /*-----------------------------------------------------------*/

45 void vHardwareConfigurePerformance( void )

46 {

47 /* set PBCLK2 to deliver 40Mhz clock for PMP/I2C/UART/SPI. */

48 SYSKEY = hwUNLOCK_KEY_0;

49 SYSKEY = hwUNLOCK_KEY_1;

51 /* 200MHz / 5 = 40MHz */

52 PB2DIVbits.PBDIV = 0b100;

54 /* Timers use clock PBCLK3, set this to 40MHz. */

55 PB3DIVbits.PBDIV = 0b100;

57 /* Ports use PBCLK4. */

58 PB4DIVbits.PBDIV = 0b000;

60 SYSKEY = 0;

62 /* Disable interrupts - note taskDISABLE_INTERRUPTS() cannot be used here as

63 FreeRTOS does not globally disable interrupt. */

64 __builtin_disable_interrupts();

65 }

66 /*-----------------------------------------------------------*/

68 void vHardwareUseMultiVectoredInterrupts( void )

69 {

70 /* Enable multi-vector interrupts. */

71 _CP0_BIS_CAUSE( 0x00800000U );

72 INTCONSET = _INTCON_MVEC_MASK;

73 __builtin_enable_interrupts();

74 }