249 lines
5.7 KiB
C
249 lines
5.7 KiB
C
/* main_pwm - OpenPCD firmware for generating a PWM-modulated 13.56MHz
|
|
* carrier
|
|
*
|
|
* To use this, you need to connect PIOA P0 with MFIN of the reader.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <lib_AT91SAM7.h>
|
|
#include "../openpcd.h"
|
|
#include "rc632.h"
|
|
#include <os/dbgu.h>
|
|
#include <os/led.h>
|
|
#include "pwm.h"
|
|
#include "tc.h"
|
|
#include "ssc.h"
|
|
#include <os/pcd_enumerate.h>
|
|
#include <os/usb_handler.h>
|
|
|
|
static u_int8_t force_100ask = 1;
|
|
static u_int8_t mod_conductance = 0x3f;
|
|
static u_int8_t cw_conductance = 0x3f;
|
|
static u_int16_t duty_percent = 22;
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
static u_int32_t pwm_freq[] = { 105937, 211875, 423750, 847500 };
|
|
static u_int8_t pwm_freq_idx = 0;
|
|
|
|
static void rc632_modulate_mfin()
|
|
{
|
|
rc632_reg_write(RAH, RC632_REG_TX_CONTROL,
|
|
RC632_TXCTRL_MOD_SRC_MFIN|RC632_TXCTRL_TX2_INV|
|
|
RC632_TXCTRL_TX1_RF_EN|RC632_TXCTRL_TX2_RF_EN);
|
|
}
|
|
|
|
/* (77/40) ^ EXPcsCfgCW */
|
|
/* 1, 1.925, 3.705625, 7.13332812 */
|
|
|
|
#define COND_MANT(x) (x & 0x0f)
|
|
#define COND_EXP(x) ((x & 0x30) >> 4)
|
|
|
|
static const u_int16_t rsrel_expfact[] = { 1000, 1925, 3706, 7133 };
|
|
|
|
static u_int32_t calc_conduct_rel(u_int8_t inp)
|
|
{
|
|
u_int32_t cond_rel;
|
|
|
|
cond_rel = COND_MANT(inp) * rsrel_expfact[COND_EXP(inp)];
|
|
cond_rel = cond_rel / 1000;
|
|
|
|
return cond_rel;
|
|
}
|
|
|
|
static const u_int8_t rsrel_table[] = {
|
|
0, 16, 32, 48, 1, 17, 2, 3, 33, 18, 4, 5, 19, 6, 7, 49, 34, 20,
|
|
8, 9, 21, 10, 11, 35, 22, 12, 13, 23, 14, 50, 36, 15, 24, 25,
|
|
37, 26, 27, 51, 38, 28, 29, 39, 30, 52, 31, 40, 41, 53, 42, 43,
|
|
54, 44, 45, 55, 46, 47, 56, 57, 58, 59, 60, 61, 62, 63 };
|
|
|
|
|
|
static const u_int16_t cdivs[] = { 128, 64, 32, 16 };
|
|
static int cdiv_idx = 0;
|
|
|
|
static void help(void)
|
|
{
|
|
DEBUGPCR("o: decrease duty p: increase duty\r\n"
|
|
"k: stop pwm l: start pwn\r\n"
|
|
"n: decrease freq m: incresae freq\r\n"
|
|
"v: decrease mod_cond b: increase mod_cond\r\n"
|
|
"g: decrease cw_cond h: increase cw_cond");
|
|
DEBUGPCR("u: PA23 const 1 y: PA23 const 0\r\n"
|
|
"t: PA23 PWM0 f: toggle Force100ASK\r\n"
|
|
"{: decrease cdiv_idx }: increse cdiv idx");
|
|
}
|
|
|
|
void _init_func(void)
|
|
{
|
|
DEBUGPCR("\r\n===> main_pwm <===\r\n");
|
|
help();
|
|
|
|
rc632_init();
|
|
DEBUGPCRF("turning on RF");
|
|
rc632_turn_on_rf(RAH);
|
|
|
|
/* switch PA17 (connected to MFIN on board) to input */
|
|
AT91F_PIO_CfgInput(AT91C_BASE_PIOA, AT91C_PIO_PA17);
|
|
|
|
DEBUGPCRF("Initializing carrier divider");
|
|
tc_cdiv_init();
|
|
|
|
DEBUGPCRF("Initializing PWM");
|
|
pwm_init();
|
|
pwm_freq_set(0, 105937);
|
|
pwm_start(0);
|
|
pwm_duty_set_percent(0, 22); /* 22% of 9.43uS = 2.07uS */
|
|
rc632_modulate_mfin();
|
|
|
|
DEBUGPCRF("Initializing SSC RX");
|
|
ssc_rx_init();
|
|
}
|
|
|
|
int _main_dbgu(char key)
|
|
{
|
|
switch (key) {
|
|
case 'o':
|
|
if (duty_percent >= 1)
|
|
duty_percent--;
|
|
pwm_duty_set_percent(0, duty_percent);
|
|
break;
|
|
case 'p':
|
|
if (duty_percent <= 99)
|
|
duty_percent++;
|
|
pwm_duty_set_percent(0, duty_percent);
|
|
break;
|
|
case 'k':
|
|
pwm_stop(0);
|
|
break;
|
|
case 'l':
|
|
pwm_start(0);
|
|
break;
|
|
case 'n':
|
|
if (pwm_freq_idx > 0) {
|
|
pwm_freq_idx--;
|
|
pwm_stop(0);
|
|
pwm_freq_set(0, pwm_freq[pwm_freq_idx]);
|
|
pwm_start(0);
|
|
pwm_duty_set_percent(0, 22); /* 22% of 9.43uS = 2.07uS */
|
|
}
|
|
break;
|
|
case 'm':
|
|
if (pwm_freq_idx < ARRAY_SIZE(pwm_freq)-1) {
|
|
pwm_freq_idx++;
|
|
pwm_stop(0);
|
|
pwm_freq_set(0, pwm_freq[pwm_freq_idx]);
|
|
pwm_start(0);
|
|
pwm_duty_set_percent(0, 22); /* 22% of 9.43uS = 2.07uS */
|
|
}
|
|
break;
|
|
case 'u':
|
|
DEBUGPCRF("PA23 output high");
|
|
AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, AT91C_PIO_PA23);
|
|
AT91F_PIO_SetOutput(AT91C_BASE_PIOA, AT91C_PIO_PA23);
|
|
break;
|
|
case 'y':
|
|
DEBUGPCRF("PA23 output low");
|
|
AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, AT91C_PIO_PA23);
|
|
AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, AT91C_PIO_PA23);
|
|
return 0;
|
|
break;
|
|
case 't':
|
|
DEBUGPCRF("PA23 PeriphA (PWM)");
|
|
AT91F_PIO_CfgPeriph(AT91C_BASE_PIOA, 0, AT91C_PA23_PWM0);
|
|
return 0;
|
|
break;
|
|
case 'f':
|
|
DEBUGPCRF("%sabling Force100ASK", force_100ask ? "Dis":"En");
|
|
if (force_100ask) {
|
|
force_100ask = 0;
|
|
rc632_clear_bits(RAH, RC632_REG_TX_CONTROL,
|
|
RC632_TXCTRL_FORCE_100_ASK);
|
|
} else {
|
|
force_100ask = 1;
|
|
rc632_set_bits(RAH, RC632_REG_TX_CONTROL,
|
|
RC632_TXCTRL_FORCE_100_ASK);
|
|
}
|
|
return 0;
|
|
break;
|
|
case 'v':
|
|
if (mod_conductance > 0) {
|
|
mod_conductance--;
|
|
rc632_reg_write(RAH, RC632_REG_MOD_CONDUCTANCE,
|
|
rsrel_table[mod_conductance]);
|
|
}
|
|
break;
|
|
case 'b':
|
|
if (mod_conductance < 0x3f) {
|
|
mod_conductance++;
|
|
rc632_reg_write(RAH, RC632_REG_MOD_CONDUCTANCE,
|
|
rsrel_table[mod_conductance]);
|
|
}
|
|
break;
|
|
case 'g':
|
|
if (cw_conductance > 0) {
|
|
cw_conductance--;
|
|
rc632_reg_write(RAH, RC632_REG_CW_CONDUCTANCE,
|
|
rsrel_table[cw_conductance]);
|
|
}
|
|
break;
|
|
case 'h':
|
|
if (cw_conductance < 0x3f) {
|
|
cw_conductance++;
|
|
rc632_reg_write(RAH, RC632_REG_CW_CONDUCTANCE,
|
|
rsrel_table[cw_conductance]);
|
|
}
|
|
break;
|
|
case '?':
|
|
help();
|
|
return 0;
|
|
break;
|
|
case '<':
|
|
tc_cdiv_phase_inc();
|
|
break;
|
|
case '>':
|
|
tc_cdiv_phase_dec();
|
|
break;
|
|
case '{':
|
|
if (cdiv_idx > 0)
|
|
cdiv_idx--;
|
|
tc_cdiv_set_divider(cdivs[cdiv_idx]);
|
|
break;
|
|
case '}':
|
|
if (cdiv_idx < ARRAY_SIZE(cdivs)-1)
|
|
cdiv_idx++;
|
|
tc_cdiv_set_divider(cdivs[cdiv_idx]);
|
|
break;
|
|
case 's':
|
|
ssc_rx_start();
|
|
break;
|
|
case 'S':
|
|
ssc_rx_stop();
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
DEBUGPCR("pwm_freq=%u, duty_percent=%u, mod_cond=%u, cw_cond=%u tc_cdiv=%u",
|
|
pwm_freq[pwm_freq_idx], duty_percent, mod_conductance, cw_conductance,
|
|
cdivs[cdiv_idx]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void _main_func(void)
|
|
{
|
|
/* first we try to get rid of pending to-be-sent stuff */
|
|
usb_out_process();
|
|
|
|
/* next we deal with incoming reqyests from USB EP1 (OUT) */
|
|
usb_in_process();
|
|
|
|
/* try unthrottling sources since we now are [more] likely to
|
|
* have empty request contexts */
|
|
rc632_unthrottle();
|
|
ssc_rx_unthrottle();
|
|
|
|
led_toggle(2);
|
|
}
|