catarrh/simtrace2
1
0
Fork 0
mirror of https://gitea.osmocom.org/sim-card/simtrace2.git synced 2026-03-16 21:28:33 +03:00
Code Issues Packages Projects Releases Wiki Activity

set main clock for using UART at 921600 bps

Browse Source 
UART baud rate is main clock (MCK) divided by CR*16.
The MCK values are chosen >= 48 MHz and <= 64 MHz to have a near
integer value CR for a baud rate of 921600 bps.
The end MCK frequency between simtrace and qmod differ slightly
but are close to 58 MHz.

Change-Id: Iaa4a97fc68494c93b9d128503515d88049de506c
This commit is contained in:
Kévin Redon
2018-08-28 19:13:06 +02:00
parent e07640c35a
commit e2b0f971e5
5 changed files with 31 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
firmware/libboard/common/include/board_common.h
View File

@@ -53,8 +53,6 @@
/** Core definition */
#define cortexm3
#define BOARD_MCK 48000000
#define PIO_LED_RED PIO_PA17
#define PIO_LED_GREEN PIO_PA18

44
firmware/libboard/common/source/board_lowlevel.c
View File

@@ -46,39 +46,39 @@
#define BOARD_OSCOUNT (CKGR_MOR_MOSCXTST(0x8))
#define BOARD_MCKR (PMC_MCKR_PRES_CLK | PMC_MCKR_CSS_PLLA_CLK)
#if (BOARD_MCK == 48000000)
#if (BOARD_MAINOSC == 18432000)
/* Clock settings at 48MHz for 18 MHz crystal */
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(13-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(5))
#elif (BOARD_MAINOSC == 12000000)
/* QMod has 12 MHz clock, so multply by 8 (96 MHz) and divide by 2 */
/** configure PLL to generate main clock based on main oscillator frequency */
#if (BOARD_MAINOSC == 12000000) && (BOARD_MCK == 48000000)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(8-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(2))
#else
#error "Please define PLLA config for your MAINOSC frequency"
#endif /* MAINOSC */
#elif (BOARD_MCK == 64000000)
#if (BOARD_MAINOSC == 18432000)
/* Clock settings at 64MHz for 18 MHz crystal: 64.512 MHz */
#elif (BOARD_MAINOSC == 12000000) && (BOARD_MCK == 58000000)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(7-1) \
| CKGR_PLLAR_MULA(29-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(2))
#elif (BOARD_MAINOSC == 12000000)
/* QMod has 12 MHz clock, so multply by 10 / div by 2: 60 MHz */
| CKGR_PLLAR_DIVA(6))
#elif (BOARD_MAINOSC == 12000000) && (BOARD_MCK == 60000000)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(10-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(2))
#error "Please define PLLA config for your MAINOSC frequency"
#endif /* MAINOSC */
#elif (BOARD_MAINOSC == 18432000) && (BOARD_MCK == 47923200)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(13-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(5))
#elif (BOARD_MAINOSC == 18432000) && (BOARD_MCK == 58982400)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(16-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(5))
#elif (BOARD_MAINOSC == 18432000) && (BOARD_MCK == 64512000)
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(7-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(2))
#else
#error "No PLL settings for current BOARD_MCK."
#error "Please define PLLA config for your BOARD_MCK/MAINOSC frequency"
#endif
#if (BOARD_MAINOSC == 12000000)

3
firmware/libboard/owhw/include/board.h
View File

@@ -25,7 +25,10 @@
/** Board definition */
#define owhw
/** oscillator used as main clock source (in Hz) */
#define BOARD_MAINOSC 18432000
/** desired main clock frequency (in Hz, based on BOARD_MAINOSC) */
#define BOARD_MCK 58982400 // 18.432 * 16 / 5
/* USIM 2 interface (USART) */
#define PIN_USIM2_CLK {PIO_PA2, PIOA, ID_PIOA, PIO_PERIPH_B, PIO_DEFAULT}

3
firmware/libboard/qmod/include/board.h
View File

@@ -28,7 +28,10 @@
/** Board definition */
#define qmod
/** oscillator used as main clock source (in Hz) */
#define BOARD_MAINOSC 12000000
/** desired main clock frequency (in Hz, based on BOARD_MAINOSC) */
#define BOARD_MCK 58000000 // 18.432 * 29 / 6
/* USIM 2 interface (USART) */
#define PIN_USIM2_CLK {PIO_PA2, PIOA, ID_PIOA, PIO_PERIPH_B, PIO_DEFAULT}

4
firmware/libboard/simtrace/include/board.h
View File

@@ -26,8 +26,10 @@
/* Board definition */
#define simtrace
/* Board main oscillator frequency (in Hz) */
/** oscillator used as main clock source (in Hz) */
#define BOARD_MAINOSC 18432000
/** desired main clock frequency (in Hz, based on BOARD_MAINOSC) */
#define BOARD_MCK 58982400 // 18.432 * 16 / 5
/** Pin configuration **/
/* Button to force bootloader start (shorted to ground when pressed */