1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file SPC560BCxx/hal_lld.c
* @brief SPC560B/Cxx HAL subsystem low level driver source.
*
* @addtogroup HAL
* @{
*/
#include "ch.h"
#include "hal.h"
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/**
* @brief PIT channel 3 interrupt handler.
*
* @isr
*/
CH_IRQ_HANDLER(vector59) {
CH_IRQ_PROLOGUE();
chSysLockFromIsr();
chSysTimerHandlerI();
chSysUnlockFromIsr();
/* Resets the PIT channel 3 IRQ flag.*/
PIT.CH[0].TFLG.R = 1;
CH_IRQ_EPILOGUE();
}
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level HAL driver initialization.
*
* @notapi
*/
void hal_lld_init(void) {
extern void _vectors(void);
uint32_t reg;
/* The system is switched to the RUN0 mode, the default for normal
operations.*/
if (halSPCSetRunMode(SPC5_RUNMODE_RUN0) == CH_FAILED)
chSysHalt();
/* INTC initialization, software vector mode, 4 bytes vectors, starting
at priority 0.*/
INTC.MCR.R = 0;
INTC.CPR.R = 0;
INTC.IACKR.R = (uint32_t)_vectors;
/* PIT channel 0 initialization for Kernel ticks, the PIT is configured
to run in DRUN,RUN0...RUN3 and HALT0 modes, the clock is gated in other
modes.*/
INTC.PSR[59].R = SPC5_PIT0_IRQ_PRIORITY;
halSPCSetPeripheralClockMode(92,
SPC5_ME_PCTL_RUN(2) | SPC5_ME_PCTL_LP(2));
reg = halSPCGetSystemClock() / CH_FREQUENCY - 1;
PIT.PITMCR.R = 1; /* PIT clock enabled, stop while debugging. */
PIT.CH[0].LDVAL.R = reg;
PIT.CH[0].CVAL.R = reg;
PIT.CH[0].TFLG.R = 1; /* Interrupt flag cleared. */
PIT.CH[0].TCTRL.R = 3; /* Timer active, interrupt enabled. */
}
/**
* @brief SPC560Pxx clocks and PLL initialization.
* @note All the involved constants come from the file @p board.h and
* @p hal_lld.h
* @note This function must be invoked only after the system reset.
*
* @special
*/
void spc_clock_init(void) {
/* Waiting for IRC stabilization before attempting anything else.*/
while (!ME.GS.B.S_FIRC)
;
/* Oscillators dividers setup.*/
CGM.FIRC_CTL.B.RCDIV = SPC5_IRCDIV_VALUE - 1;
CGM.FXOSC_CTL.B.OSCDIV = SPC5_XOSCDIV_VALUE - 1;
#if !SPC5_NO_INIT
#if defined(SPC5_OSC_BYPASS)
/* If the board is equipped with an oscillator instead of a xtal then the
bypass must be activated.*/
CGM.OSC_CTL.B.OSCBYP = TRUE;
#endif /* SPC5_ENABLE_XOSC */
/* Initialization of the FMPLLs settings.*/
CGM.FMPLL_CR.R = SPC5_FMPLL0_ODF |
((SPC5_FMPLL0_IDF_VALUE - 1) << 26) |
(SPC5_FMPLL0_NDIV_VALUE << 16);
CGM.FMPLL_MR.R = 0; /* TODO: Add a setting. */
/* Run modes initialization.*/
ME.MER.R = SPC5_ME_ME_BITS; /* Enabled run modes. */
ME.TEST.R = SPC5_ME_TEST_MC_BITS; /* TEST run mode. */
ME.SAFE.R = SPC5_ME_SAFE_MC_BITS; /* SAFE run mode. */
ME.DRUN.R = SPC5_ME_DRUN_MC_BITS; /* DRUN run mode. */
ME.RUN[0].R = SPC5_ME_RUN0_MC_BITS; /* RUN0 run mode. */
ME.RUN[1].R = SPC5_ME_RUN1_MC_BITS; /* RUN1 run mode. */
ME.RUN[2].R = SPC5_ME_RUN2_MC_BITS; /* RUN2 run mode. */
ME.RUN[3].R = SPC5_ME_RUN3_MC_BITS; /* RUN0 run mode. */
ME.HALT0.R = SPC5_ME_HALT0_MC_BITS; /* HALT0 run mode. */
ME.STOP0.R = SPC5_ME_STOP0_MC_BITS; /* STOP0 run mode. */
ME.STANDBY0.R = SPC5_ME_STANDBY0_MC_BITS; /* STANDBY0 run mode. */
/* Peripherals run and low power modes initialization.*/
ME.RUNPC[0].R = SPC5_ME_RUN_PC0_BITS;
ME.RUNPC[1].R = SPC5_ME_RUN_PC1_BITS;
ME.RUNPC[2].R = SPC5_ME_RUN_PC2_BITS;
ME.RUNPC[3].R = SPC5_ME_RUN_PC3_BITS;
ME.RUNPC[4].R = SPC5_ME_RUN_PC4_BITS;
ME.RUNPC[5].R = SPC5_ME_RUN_PC5_BITS;
ME.RUNPC[6].R = SPC5_ME_RUN_PC6_BITS;
ME.RUNPC[7].R = SPC5_ME_RUN_PC7_BITS;
ME.LPPC[0].R = SPC5_ME_LP_PC0_BITS;
ME.LPPC[1].R = SPC5_ME_LP_PC1_BITS;
ME.LPPC[2].R = SPC5_ME_LP_PC2_BITS;
ME.LPPC[3].R = SPC5_ME_LP_PC3_BITS;
ME.LPPC[4].R = SPC5_ME_LP_PC4_BITS;
ME.LPPC[5].R = SPC5_ME_LP_PC5_BITS;
ME.LPPC[6].R = SPC5_ME_LP_PC6_BITS;
ME.LPPC[7].R = SPC5_ME_LP_PC7_BITS;
/* Switches again to DRUN mode (current mode) in order to update the
settings.*/
if (halSPCSetRunMode(SPC5_RUNMODE_DRUN) == CH_FAILED)
chSysHalt();
/* CFLASH settings calculated for a maximum clock of 64MHz.*/
CFLASH.PFCR0.B.BK0_APC = 2;
CFLASH.PFCR0.B.BK0_RWSC = 2;
CFLASH.PFCR1.B.BK1_APC = 2;
CFLASH.PFCR1.B.BK1_RWSC = 2;
/* Initialization of e200z0 special registers.*/
port_mtspr(1013, 0x00000001); /* BPEN=1. */
#endif /* !SPC5_NO_INIT */
}
/**
* @brief Switches the system to the specified run mode.
*
* @param[in] mode one of the possible run modes
*
* @return The operation status.
* @retval CH_SUCCESS if the switch operation has been completed.
* @retval CH_FAILED if the switch operation failed.
*/
bool_t halSPCSetRunMode(spc560prunmode_t mode) {
/* Starts a transition process.*/
ME.MCTL.R = SPC5_ME_MCTL_MODE(mode) | SPC5_ME_MCTL_KEY;
ME.MCTL.R = SPC5_ME_MCTL_MODE(mode) | SPC5_ME_MCTL_KEY_INV;
/* Waits the transition process to start.*/
while (!ME.GS.B.S_MTRANS)
;
/* Waits the transition process to end.*/
while (ME.GS.B.S_MTRANS)
;
/* Verifies that the mode has been effectively switched.*/
if (ME.GS.B.S_CURRENTMODE != mode)
return CH_FAILED;
return CH_SUCCESS;
}
/**
* @brief Changes the clock mode of a peripheral.
*
* @param[in] n index of the @p PCTL register
* @param[in] pctl new value for the @p PCTL register
*
* @notapi
*/
void halSPCSetPeripheralClockMode(uint32_t n, uint32_t pctl) {
uint32_t mode;
ME.PCTL[n].R = pctl;
mode = ME.MCTL.B.TARGET_MODE;
ME.MCTL.R = SPC5_ME_MCTL_MODE(mode) | SPC5_ME_MCTL_KEY;
ME.MCTL.R = SPC5_ME_MCTL_MODE(mode) | SPC5_ME_MCTL_KEY_INV;
}
#if !SPC5_NO_INIT || defined(__DOXYGEN__)
/**
* @brief Returns the system clock under the current run mode.
*
* @return The system clock in Hertz.
*/
uint32_t halSPCGetSystemClock(void) {
uint32_t sysclk;
sysclk = ME.GS.B.S_SYSCLK;
switch (sysclk) {
case SPC5_ME_GS_SYSCLK_IRC:
return SPC5_IRC_CLK;
case SPC5_ME_GS_SYSCLK_DIVIRC:
return SPC5_IRC_CLK / SPC5_IRCDIV_VALUE;
case SPC5_ME_GS_SYSCLK_XOSC:
return SPC5_XOSC_CLK / SPC5_XOSCDIV_VALUE;
case SPC5_ME_GS_SYSCLK_DIVXOSC:
return SPC5_XOSC_CLK;
case SPC5_ME_GS_SYSCLK_FMPLL0:
return SPC5_FMPLL0_CLK;
default:
return 0;
}
}
#endif /* !SPC5_NO_INIT */
/** @} */
|