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
260
261
262
263
|
/*
* Licensed under ST Liberty SW License Agreement V2, (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.st.com/software_license_agreement_liberty_v2
*
* 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.
*/
/**
* @file SPC56ELxx/hal_lld.c
* @brief SPC56ELxx 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. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level HAL driver initialization.
*
* @notapi
*/
void hal_lld_init(void) {
extern void _vectors(void);
uint32_t n;
/* The system is switched to the RUN0 mode, the default for normal
operations.*/
if (halSPCSetRunMode(SPC5_RUNMODE_RUN0) == CH_FAILED)
chSysHalt();
/* Down-counter timer initialized for system tick use, TB enabled for debug
and measurements.*/
n = halSPCGetSystemClock() / CH_FREQUENCY;
asm volatile ("mtspr 22, %[n] \t\n" /* Init. DEC register. */
"mtspr 54, %[n] \t\n" /* Init. DECAR register.*/
"li %%r3, 0x4000 \t\n" /* TBEN bit. */
"mtspr 1008, %%r3 \t\n" /* HID0 register. */
"lis %%r3, 0x0440 \t\n" /* DIE ARE bits. */
"mtspr 340, %%r3" /* TCR register. */
: : [n] "r" (n) : "r3");
/* 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;
}
/**
* @brief SPC56ELxx early 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_early_init(void) {
/* TODO: Check for an invalid ME mode on entry.*/
/* Waiting for IRC stabilization before attempting anything else.*/
while (!ME.GS.B.S_IRCOSC)
;
#if !SPC5_NO_INIT
/* Enables the branch prediction, clears and enables the BTB into the
BUCSR special register (1013).*/
asm volatile ("li %%r3, 0x0201 \t\n"
"mtspr 1013, %%r3": : : "r3");
/* SSCM initialization. Setting up the most restrictive handling of
invalid accesses to peripherals.*/
SSCM.ERROR.R = 3; /* PAE and RAE bits. */
/* Enabling peripheral bridges to allow any operation.*/
AIPS.MPROT.R = 0x77777777;
AIPS.PACR0_7.R = 0;
AIPS.PACR8_15.R = 0;
AIPS.PACR16_23.R = 0;
AIPS.PACR24_31.R = 0;
AIPS.OPACR0_7.R = 0;
AIPS.OPACR8_15.R = 0;
AIPS.OPACR16_23.R = 0;
AIPS.OPACR24_31.R = 0;
AIPS.OPACR32_39.R = 0;
AIPS.OPACR40_47.R = 0;
AIPS.OPACR48_55.R = 0;
AIPS.OPACR56_63.R = 0;
AIPS.OPACR64_71.R = 0;
AIPS.OPACR72_79.R = 0;
AIPS.OPACR80_87.R = 0;
AIPS.OPACR88_95.R = 0;
#if defined(SPC5_OSC_BYPASS)
/* If the board is equipped with an oscillator instead of a crystal then the
bypass must be activated.*/
CGM.OSC_CTL.B.OSCBYP = TRUE;
#endif /* SPC5_OSC_BYPASS */
/* Enable clocks to all peripherals: */
/* CGM.SC_DC0.R = 0x80;
CGM.AC0_DC0_3.R = 0x80808080;
CGM.AC1_DC0_3.R = 0x80808080;
CGM.AC2_DC0_3.R = 0x85808080;
CGM.AC0_SC.R = 0x04000000;
CGM.AC2_SC.R = 0x04000000;*/
/* PLLs clock sources.*/
CGM.AC3_SC.R = SPC5_FMPLL0_CLK_SRC;
CGM.AC4_SC.R = SPC5_FMPLL1_CLK_SRC;
/* Switches to XOSC in order to check its functionality.*/
ME.DRUN.R = SPC5_ME_MC_SYSCLK_IRC | SPC5_ME_MC_IRCON | SPC5_ME_MC_XOSC0ON | \
SPC5_ME_MC_FLAON_NORMAL | SPC5_ME_MC_MVRON;
if (halSPCSetRunMode(SPC5_RUNMODE_DRUN) == CH_FAILED)
chSysHalt();
/* Initialization of the FMPLLs settings.*/
CGM.FMPLL[0].CR.R = SPC5_FMPLL0_ODF |
((SPC5_FMPLL0_IDF_VALUE - 1) << 26) |
(SPC5_FMPLL0_NDIV_VALUE << 16);
CGM.FMPLL[0].MR.R = 0; /* TODO: Add a setting. */
CGM.FMPLL[1].CR.R = SPC5_FMPLL1_ODF |
((SPC5_FMPLL1_IDF_VALUE - 1) << 26) |
(SPC5_FMPLL1_NDIV_VALUE << 16);
CGM.FMPLL[1].MR.R = 0; /* TODO: Add a setting. */
/* Run modes initialization.*/
ME.MER.R = SPC5_ME_ME_BITS; /* Enabled run modes. */
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. */
/* 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;
/* 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;*/
/* Switches again to DRUN mode (current mode) in order to update the
settings.*/
if (halSPCSetRunMode(SPC5_RUNMODE_DRUN) == CH_FAILED)
chSysHalt();
#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(spc5_runmode_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 for the mode switch.
TODO: Check for errors during the switch procedure.*/
while (ME.GS.B.S_CURRENT_MODE != mode)
;
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_XOSC:
return SPC5_XOSC_CLK;
case SPC5_ME_GS_SYSCLK_FMPLL0:
return SPC5_FMPLL0_CLK;
default:
return 0;
}
}
#endif /* !SPC5_NO_INIT */
/** @} */
|
