Kévin Redon has uploaded this change for review. (
https://gerrit.osmocom.org/13681
Change subject: add sim-atr command
......................................................................
add sim-atr command
the sim-atr command resets the card and read the resulting
answer to reset.
Change-Id: I30b284cab60a50d4cd3080f46f4d332193bbf1ee
---
M sysmoOCTSIM/main.c
1 file changed, 90 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-ccid-firmware
refs/changes/81/13681/1
diff --git a/sysmoOCTSIM/main.c b/sysmoOCTSIM/main.c
index afd7bf2..788343e 100644
--- a/sysmoOCTSIM/main.c
+++ b/sysmoOCTSIM/main.c
@@ -21,6 +21,7 @@
#include <parts.h>
#include <hal_cache.h>
#include <hri_port_e54.h>
+#include <utils_ringdmabuffer.h>
#include "atmel_start.h"
#include "atmel_start_pins.h"
@@ -31,6 +32,13 @@
#include "command.h"
+// TODO put declaration in more global file
+// TODO for now SIM7 is not present because used for debug
+static struct usart_async_descriptor* SIM_peripheral_descriptors[] = {&SIM0,
&SIM1, &SIM2, &SIM3, &SIM4, &SIM5, &SIM6, NULL};
+
+static void SIM_rx_cb(const struct usart_async_descriptor *const io_descr)
+{
+}
static void board_init()
{
@@ -49,6 +57,15 @@
/* increase drive strength of 20Mhz SIM clock output to 8mA
* (there are 8 inputs + traces to drive!) */
hri_port_set_PINCFG_DRVSTR_bit(PORT, 0, 11);
+
+ // enable SIM interfaces
+ for (uint8_t i = 0; i < ARRAY_SIZE(SIM_peripheral_descriptors); i++) {
+ if (NULL == SIM_peripheral_descriptors[i]) {
+ continue;
+ }
+ usart_async_register_callback(SIM_peripheral_descriptors[i],
USART_ASYNC_RXC_CB, SIM_rx_cb); // required for RX to work, even if the
callback does nothing
+ usart_async_enable(SIM_peripheral_descriptors[i]);
+ }
}
DEFUN(hello_fn, cmd_hello,
@@ -210,6 +227,78 @@
ncn8025_set(slotnr, &settings);
}
+DEFUN(sim_atr, cmd_sim_atr, "sim-atr", "Read ATR from SIM card")
+{
+ struct ncn8025_settings settings;
+ int slotnr = validate_slotnr(argc, argv, 1);
+
+ if (slotnr < 0 || slotnr >= ARRAY_SIZE(SIM_peripheral_descriptors) ||
NULL == SIM_peripheral_descriptors[slotnr]) {
+ return;
+ }
+
+ // check if card is present (and read current settings)
+ ncn8025_get(slotnr, &settings);
+ if (!settings.simpres) {
+ printf("no card present in slot %d\r\n", slotnr);
+ return;
+ }
+
+ // switch card off (assert reset and disable power)
+ // note: ISO/IEC 7816-3:2006 section 6.4 provides the deactivation
sequence, but not the minimum corresponding times
+ settings.rstin = false;
+ settings.cmdvcc = false;
+ ncn8025_set(slotnr, &settings);
+ // TODO wait some time for card to be completely deactivated
+ usart_async_flush_rx_buffer(SIM_peripheral_descriptors[slotnr]); //
flush RX buffer to start from scratch
+ //usart_async_set_baud_rate(SIM_peripheral_descriptors[slotnr], 2500000
/ (372 / 1)); // set USART baud rate to match the interface (f = 2.5 MHz) and
card default settings (Fd = 372, Dd = 1)
+ // set clock to lowest frequency (20 MHz / 8 = 2.5 MHz)
+ // note: according to ISO/IEC 7816-3:2006 section 5.2.3 the minimum
value is 1 MHz, and maximum is 5 MHz during activation
+ settings.clkdiv = SIM_CLKDIV_8;
+ ncn8025_set(slotnr, &settings);
+ // set card voltage to 3.0 V (the most supported)
+ // note: according to ISO/IEC 7816-3:2006 no voltage should damage the
card, and you should cycle from low to high
+ settings.vsel = SIM_VOLT_3V0;
+ ncn8025_set(slotnr, &settings);
+ // provide power (the NCN8025 should perform the activation according
to spec)
+ // note: activation sequence is documented in ISO/IEC 7816-3:2006
section 6.2
+ settings.cmdvcc = true;
+ ncn8025_set(slotnr, &settings);
+ // wait for Tb=400 cycles before re-asserting reset
+ delay_us(400 * 10000 / 2500); // 400 cycles * 1000 for us, 2.5 MHz /
1000 for us
+ // de-assert reset to switch card back on
+ settings.rstin = true;
+ ncn8025_set(slotnr, &settings);
+ // wait for Tc=40000 cycles for transmission to start
+ uint32_t cycles = 40000;
+ while (cycles &&
!usart_async_is_rx_not_empty(SIM_peripheral_descriptors[slotnr])) {
+ delay_us(10);
+ cycles -= 25; // 10 us = 25 cycles at 2.5 MHz
+ }
+ if (!usart_async_is_rx_not_empty(SIM_peripheral_descriptors[slotnr])) {
+ delay_us(12 * 372 / 1 / 2); // wait more than one byte
(approximate freq down to 2 MHz)
+ }
+ // verify if one byte has been received
+ if (!usart_async_is_rx_not_empty(SIM_peripheral_descriptors[slotnr])) {
+ printf("card in slot %d is not responding\r\n", slotnr);
+ return;
+ }
+ // read ATR (just do it until there is no traffic anymore)
+ // TODO the ATR should be parsed to read the right number of bytes
+ printf("ATR: ");
+ uint8_t atr_byte;
+ while (usart_async_is_rx_not_empty(SIM_peripheral_descriptors[slotnr]))
{
+ if (1 == io_read(&SIM_peripheral_descriptors[slotnr]->io,
&atr_byte, 1)) {
+ printf("%02x ", atr_byte);
+ }
+ uint16_t wt = 9600; // waiting time in ETU
+ while (wt &&
!usart_async_is_rx_not_empty(SIM_peripheral_descriptors[slotnr])) {
+ delay_us(149); // wait for 1 ETU (372 / 1 / 2.5 MHz =
148.8 us)
+ wt--;
+ }
+ }
+ printf("\r\n");
+}
+
int main(void)
{
atmel_start_init();
@@ -226,6 +315,7 @@
command_register(&cmd_sim_clkdiv);
command_register(&cmd_sim_voltage);
command_register(&cmd_sim_led);
+ command_register(&cmd_sim_atr);
printf("\r\n\r\nsysmocom sysmoOCTSIM\r\n");
while (true) { // main loop
--
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Gerrit-Project: osmo-ccid-firmware
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I30b284cab60a50d4cd3080f46f4d332193bbf1ee
Gerrit-Change-Number: 13681
Gerrit-PatchSet: 1
Gerrit-Owner: Kévin Redon <[email protected]>
