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[/] [minsoc/] [branches/] [rc-1.0/] [utils/] [contributions/] [gpio/] [sw/] [old/] [gpio.c] - Blame information for rev 40

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Line No. Rev Author Line
1 40 rfajardo 
#include "../support/support.h"
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#include "../support/board.h"
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#include "../support/uart.h"
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#include "../support/spr_defs.h"
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#include "gpio.h"
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9 
 
10 
void uart_print_str(char *);
11 
void uart_print_long(unsigned long);
12 
 
13 
// Dummy or32 except vectors
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void buserr_except(){}
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void dpf_except(){}
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void ipf_except(){}
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void lpint_except(){}
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void align_except(){}
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void illegal_except(){}
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/*void hpint_except(){
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}*/
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void dtlbmiss_except(){}
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void itlbmiss_except(){}
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void range_except(){}
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void syscall_except(){}
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void res1_except(){}
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void trap_except(){}
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void res2_except(){}
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31 
 
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void uart_interrupt()
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{
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    char lala;
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    unsigned char interrupt_id;
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    interrupt_id = REG8(UART_BASE + UART_IIR);
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    if ( interrupt_id & UART_IIR_RDI )
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    {
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        lala = uart_getc();
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        uart_putc(lala+1);
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    }
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}
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44 
 
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void uart_print_str(char *p)
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{
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        while(*p != 0) {
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                uart_putc(*p);
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                p++;
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        }
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}
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void uart_print_long(unsigned long ul)
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{
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  int i;
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  char c;
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58 
 
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  uart_print_str("0x");
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  for(i=0; i<8; i++) {
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  c = (char) (ul>>((7-i)*4)) & 0xf;
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  if(c >= 0x0 && c<=0x9)
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    c += '0';
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  else
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    c += 'a' - 10;
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  uart_putc(c);
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  }
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}
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void uart_print_short(unsigned long ul)
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{
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  int i;
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  char c;
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  char flag=0;
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78 
 
79 
  uart_print_str("0x");
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  for(i=0; i<8; i++) {
81 
 
82 
  c = (char) (ul>>((7-i)*4)) & 0xf;
83 
  if(c >= 0x0 && c<=0x9)
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    c += '0';
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  else
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    c += 'a' - 10;
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  if ((c != '0') || (i==7))
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    flag=1;
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  if(flag)
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    uart_putc(c);
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  }
92 
 
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}
94 
 
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/*
96 
 *
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 *
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 *
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 *
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 *
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 *
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 *
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 *
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 *
105 
 */
106 
 
107 
void gpio_init(gpio_t *gpio, long instance_num, unsigned long base_addr)
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{
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    int i = MIN_GPIO_BIT;
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    if ( gpio != NULL ) {
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            gpio->instance_num = instance_num;
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            gpio->base_addr = (unsigned char*)base_addr;
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            for ( ;i<=MAX_GPIO_BIT;i++)
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                    gpio->vectors[i].vec = NULL;
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            return;
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    } else {
118 
            // Print the error msgs here
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            //
120 
            uart_print_str("gpio inst in NULL.\n");
121 
            return;
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    }
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}
124 
 
125 
void gpio_config_bit(gpio_t *gpio, unsigned long bit, iotype_t io)
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{
127 
    if ( gpio != NULL ) {
128 
            if ( io == IO_INPUT ) {
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                gpio->io_config |= (1 << bit);
130 
                *(unsigned long*)(gpio->base_addr + OE_REG_OFFSET) &= (~(1 << bit));
131 
            } else {
132 
                gpio->io_config &= (~(1 << bit));
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                *(unsigned long*)(gpio->base_addr + OE_REG_OFFSET) |= (1 << bit);
134 
            }
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            return;
136 
    } else {
137 
            // Print the error msgs here
138 
            //
139 
            uart_print_str("gpio inst in NULL.\n");
140 
            return;
141 
    }
142 
}
143 
 
144 
void gpio_set_bit(gpio_t *gpio, unsigned long bit, unsigned long val)
145 
{
146 
    if ( gpio != NULL ) {
147 
            if ( val != 0 )
148 
                *(unsigned long*)(gpio->base_addr + OUT_REG_OFFSET) |= (1 << bit);
149 
            else
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                *(unsigned long*)(gpio->base_addr + OUT_REG_OFFSET) &= (~(1 << bit));
151 
            return;
152 
    } else {
153 
            // Print the error msgs here
154 
            //
155 
            uart_print_str("gpio inst in NULL.\n");
156 
            return;
157 
    }
158 
}
159 
 
160 
void gpio_get_bit(gpio_t *gpio, unsigned long bit, unsigned long *val)
161 
{
162 
    unsigned long temp;
163 
 
164 
    if ( gpio != NULL ) {
165 
            temp = *(unsigned long*)(gpio->base_addr + IN_REG_OFFSET);
166 
            *val = (temp & (1 << bit))? 1 : 0;
167 
            return;
168 
    } else {
169 
            // Print the error msgs here
170 
            //
171 
            uart_print_str("gpio inst in NULL.\n");
172 
            return;
173 
    }
174 
}
175 
 
176 
 
177 
void gpio_add_interrupt(gpio_t *gpio, unsigned int bit, edge_t edge,void (*func)() )
178 
{
179 
    if ( gpio != NULL ) {
180 
        if ( ( gpio->io_config &(1 << bit)) != 0 ) {  // Port bit is configured as IO_INPUT
181 
                //
182 
                // Disable the interrupts
183 
                //
184 
                *(unsigned long*)(gpio->base_addr + CTRL_REG_OFFSET) &= (~0x01);
185 
 
186 
                // Enable the interrupt bit
187 
                //
188 
                *(unsigned long*)(gpio->base_addr + INTE_REG_OFFSET) |= (1 << bit);
189 
 
190 
                // Enable the edge type
191 
                //
192 
                if ( edge == POS_EDGE )
193 
                    *(unsigned long*)(gpio->base_addr + PTRIG_REG_OFFSET) |= (1 << bit);
194 
                else
195 
                    *(unsigned long*)(gpio->base_addr + PTRIG_REG_OFFSET) &= (~(1 << bit));
196 
 
197 
                // Set the function vector
198 
                //
199 
                gpio->vectors[bit].vec = func;
200 
 
201 
                int_add( 6, gpio_interrupt, gpio );
202 
 
203 
                // Re-enable the global control bit
204 
                //
205 
                    *(unsigned long*)(gpio->base_addr + CTRL_REG_OFFSET) |= 0x01;
206 
        } else {
207 
                // Port is configured as IO_OUTPUT
208 
                uart_print_str("gpio pin is not an input pin.\n");
209 
                return;
210 
        }
211 
 
212 
    } else {
213 
            // Print the error msgs here
214 
            //
215 
            uart_print_str("gpio inst in NULL.\n");
216 
            return;
217 
    }
218 
 
219 
}
220 
 
221 
void gpio_interrupt(gpio_t *gpio)
222 
{
223 
    int i;
224 
    unsigned long int interrupt_status;
225 
 
226 
    if ( (*(unsigned long*)(gpio->base_addr + CTRL_REG_OFFSET)) & 0x02 )
227 
    {
228 
            // Interrupt is pending here
229 
            //
230 
            interrupt_status = *(unsigned long*)(gpio->base_addr + INTS_REG_OFFSET);
231 
 
232 
            // Prioritize from lower bits(0) to higher ones(31)
233 
            //
234 
 
235 
            for ( i=MIN_GPIO_BIT; i<=MAX_GPIO_BIT; i++ ) {
236 
                if ( (interrupt_status & (1<<i)) ) {
237 
                    *(unsigned long*)(gpio->base_addr + INTS_REG_OFFSET) &= (~( 1 << i ));
238 
                    (gpio->vectors[i].vec)();
239 
                }
240 
            }
241 
 
242 
            *(unsigned long*)(gpio->base_addr + CTRL_REG_OFFSET) &= (~0x02);
243 
 
244 
    }
245 
}
246 
 
247 
void hello_east()
248 
{
249 
        uart_print_str("Hello from PUSH Button EAST.\n");
250 
}
251 
 
252 
 
253 
void hello_west()
254 
{
255 
        uart_print_str("Hello from PUSH Button WEST.\n");
256 
}
257 
 
258 
 
259 
void hello_south()
260 
{
261 
        uart_print_str("Hello from PUSH Button SOUTH.\n");
262 
}
263 
 
264 
 
265 
 
266 
 
267 
#define MAX_COUNT 10
268 
 
269 
int main()
270 
{
271 
        gpio_t gpio_1;
272 
        unsigned long t0, t1, t2, t3;
273 
        unsigned long count = 0;
274 
 
275 
        uart_init();
276 
        int_init();
277 
        int_add(2,&uart_interrupt);
278 
 
279 
        gpio_init( &gpio_1, 1, GPIO_BASE );
280 
 
281 
        gpio_config_bit( &gpio_1, LED_0, IO_OUTPUT);
282 
        gpio_config_bit( &gpio_1, LED_1, IO_OUTPUT);
283 
        gpio_config_bit( &gpio_1, LED_2, IO_OUTPUT);
284 
        gpio_config_bit( &gpio_1, LED_3, IO_OUTPUT);
285 
        gpio_config_bit( &gpio_1, LED_4, IO_OUTPUT);
286 
        gpio_config_bit( &gpio_1, LED_5, IO_OUTPUT);
287 
        gpio_config_bit( &gpio_1, LED_6, IO_OUTPUT);
288 
        gpio_config_bit( &gpio_1, LED_7, IO_OUTPUT);
289 
 
290 
        gpio_config_bit( &gpio_1, DIP_0, IO_INPUT);
291 
        gpio_config_bit( &gpio_1, DIP_1, IO_INPUT);
292 
        gpio_config_bit( &gpio_1, DIP_2, IO_INPUT);
293 
        gpio_config_bit( &gpio_1, DIP_3, IO_INPUT);
294 
 
295 
        uart_print_str("Demo 1 : Check for running LED patterns on board ...\n");
296 
 
297 
        while ( count++ < MAX_COUNT ) {
298 
                gpio_set_bit( &gpio_1, LED_7, 0 );
299 
                gpio_set_bit( &gpio_1, LED_0, 1 );
300 
                udelay( 100000 );
301 
                gpio_set_bit( &gpio_1, LED_0, 0 );
302 
                gpio_set_bit( &gpio_1, LED_1, 1 );
303 
                udelay( 100000 );
304 
                gpio_set_bit( &gpio_1, LED_1, 0 );
305 
                gpio_set_bit( &gpio_1, LED_2, 1 );
306 
                udelay( 100000 );
307 
                gpio_set_bit( &gpio_1, LED_2, 0 );
308 
                gpio_set_bit( &gpio_1, LED_3, 1 );
309 
                udelay( 100000 );
310 
                gpio_set_bit( &gpio_1, LED_3, 0 );
311 
                gpio_set_bit( &gpio_1, LED_4, 1 );
312 
                udelay( 100000 );
313 
                gpio_set_bit( &gpio_1, LED_4, 0 );
314 
                gpio_set_bit( &gpio_1, LED_5, 1 );
315 
                udelay( 100000 );
316 
                gpio_set_bit( &gpio_1, LED_5, 0 );
317 
                gpio_set_bit( &gpio_1, LED_6, 1 );
318 
                udelay( 100000 );
319 
                gpio_set_bit( &gpio_1, LED_6, 0 );
320 
                gpio_set_bit( &gpio_1, LED_7, 1 );
321 
                udelay( 100000 );
322 
        }
323 
 
324 
        gpio_set_bit( &gpio_1, LED_7, 0 );
325 
 
326 
        gpio_config_bit( &gpio_1, PUSH_EAST, IO_INPUT);
327 
        gpio_add_interrupt( &gpio_1, PUSH_EAST, POS_EDGE, hello_east );
328 
        gpio_config_bit( &gpio_1, PUSH_WEST, IO_INPUT);
329 
        gpio_add_interrupt( &gpio_1, PUSH_WEST, POS_EDGE, hello_west );
330 
        gpio_config_bit( &gpio_1, PUSH_SOUTH, IO_INPUT);
331 
        gpio_add_interrupt( &gpio_1, PUSH_SOUTH, POS_EDGE, hello_south );
332 
 
333 
        uart_print_str("Demo 2 : Press the DIP switches and watch corresponding LED glow ...\n");
334 
 
335 
 
336 
        while (1) {
337 
                gpio_get_bit( &gpio_1, DIP_0, &t0 );
338 
                gpio_get_bit( &gpio_1, DIP_1, &t1 );
339 
                gpio_get_bit( &gpio_1, DIP_2, &t2 );
340 
                gpio_get_bit( &gpio_1, DIP_3, &t3 );
341 
                //
342 
                gpio_set_bit( &gpio_1, LED_0, t0 );
343 
                gpio_set_bit( &gpio_1, LED_1, t1 );
344 
                gpio_set_bit( &gpio_1, LED_2, t2 );
345 
                gpio_set_bit( &gpio_1, LED_3, t3 );
346 
        }
347 
 
348 
 
349 
        report(0xdeaddead);
350 
        or32_exit(0);
351 
}

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